Car lift plans

[Lambo]

Guys I have searched the web and so far no luck, does anyone know of a set of plans for a simple manual car lift that i could put together, i'm running out of floor space, i am thinking of something with 2 or 4 posts and some sort of manual mechanical lift, don't need hydraulics just something like the old bumper jacks, cars to be lifted are not heavy just chassis with wheels.

Regards
Lambo