I am not sure what you want because custom things get expensive very quick but if its big chunky single legs one at each end you may have to get them made but here some more ideas
Here list of web site of other stuff you could look at !
Try finding old desk to steel them off ?
Try some like the T bar table leg or even Electronic height adjustable (but that could be big money) from hafele Table Bases, Fittings and Frames - Legs, Feet & Castors | H
There stuff called speed frame that is square 1x1 square tubeing that can be cut and has fitting to make frames Speedframe - Dexion Special Product Solutions - Dexion UK
Or you can try some call key clamp if you want something more industrial its kind of scaffold that can be cut up and bolted together Tube Clamps Online Allen Key Fittings Q Clamps Fittings For Handrails
If any of them are not your idea post pic of what you do want ? as You are going to find hard to get real bling cheep !!!!