Production of souvenir usb-flash drives with the original design (question)

I think that's going to do the design and manufacture of flash drives. Under the manufacture means only the production of buildings with the original design and stuffing there ready-made interiors. Only here is the problem - where to get these insides.

Can someone from the habra people tell you where you can wholesale order cheap flash drives without a case? :) I would be very grateful for any information and pledge to write articles about the difficulties and successes of the company, if I do it.
What do you think about this business?