A table saw kit where you use a portable circular saw upside down?

A table saw kit where you use a portable circular saw upside down?
I’ve searched everywhere, Google, Yahoo, Bing, Ebay, Craigslist, and I can’t find what I am looking for. Does anyone know a brand name or a website that sells a folding table that has a slot for a blade and all you do is take your portable circular saw and clamp it to the bottom, and you have a table saw! My farther-in-law owns one and he bought his at Kmart at least a decade or so ago for $ 50.00. I’ve been searching and searching and I don’t know what you would call it or where to buy one. It would be a great tool to have. So any links or idea of what its technical name would be or if you have one to sell, please, you help would be appreciated! Thanks!
(And please don’t answer, Ebay or anything like that, if your read my question, I have already looked)

Suggestion by framer454
Check this out. http://www.youtube.com/watch?v=AkWgzAk0kuQ

Suggestion by teaman
I don’t think they make those anymore because they were dangerous, since the under mounted circular saw would loosen up from the underside mount. A portable bench saw is more or less the modern version of this idea, a circular saw mounted under a small table, but mounted in a more secure mount. If you need more table space you could buy portable table extensions for the a portable bench saw .

Or you could try the newer versions of this that concept with the skil-xbench .

http://www.skilshop.com/

http://www.skilshop.com/products/3100-12.html

or the power 8 workshop

http://www.power8workshop.com/index.php

Is there any difference between a circular saw and a table saw other than it being portable?

Suggestion by Swick
yes a circular saw is held in your hand and a table saw is not. A table saw is easier to use when making straight edge cuts on longer pieces of wood, a circular saw can veer off the beaten path, unless you take extra measures like using vices and 2 X 4′s. A circular saw is more convenient for cuts that do not have to be as exact or precise also, but they can still be exact if you know how to use it properly. You can also use different kinds of blades & cutting wheels on circular saws that you probably would not use on table saws. All in all if you have garage space a table saw is good to have, but having one does not eliminate the need to have the other. It really depends on what you will be using it for or trying to achieve. I’ve gotten by for a long time not having a table saw, but if I were making cabinets or something then the table saw is a must have.

Suggestion by Steve
Yes.

Hand-held circular saws are much less powerful than even your basic stationary table saw, which typically feeds off 220 volts or more or power, compared to the 120 volts in outlet plug-ins.

Usually the blades are different too, although sometimes you can interchange them depending if the arbor size is the same. Circular saws usually have steel blades with no carbide tips in them, because of the type of cuts they are most commonly used for. This would include fairly crude construction cuts on OSB, ply, and two by fours.
Table saws are primarily used for more accurate cuts, and also aren’t suited for cross cuts of 2×4′s.
They use a fence to guide material, and usually have a blade with carbide tips welded on to provide sharper accurate cuts.

Suggestion by BFranklin
Power capability of a table saw could be designed to be many times greater than a circular saw.
Table saws can take much larger diameter blades.
Consequently, can cut through bigger thickness of wood.

Suggestion by Dan the brick man
portability is the biggest difference. there are some powerful circular saws on the market and some wimpy table saws, so its not always about power…