I built mine - got the drum from Canada - it is an excellent buy as it has a velcro surface which means changing papers is a breeze.
Stockroom Supply is the name of the company. I then built a simple box with a bed hinged at one end with two precision do hinges and a pice of threaded rod to raise and lower it. Took half a day and cost about half the price of a 'real' one. You must have fine dust extraction tho'...