From looking at the images and description on the product listing, there are a few hashing boards (3) and a control board (apparently a composite board in its own right), and the mining boards are connected with 18-pin ribbon cables. Each mining board contains supporting electronics and a bunch of BM1385 ICs that do the actual hashing.
If he truly mean's "what will i need to make an asic antminer s7?". He is going to need a LOT it is not something you really order say a parts kit and put together. It comes as a unit ready to go.
If you mean what do you need with purchasing a S7 to make it run, well then a PSU. I would suggest using the Bitmain AP3 PSU. But if you truly mean make and want parts to make it is going to be hard. About the best you could do is buy broken ones and try to repair, but not sure why you would go this route vs buying a working unit.