dude....  someone already did this and released the entire BOM (bill of materials), Gerber Docs, etc.  It was for bitfury chips.  Search the custom hardware forum.

really, all you need to do then (you say you are funded, right?) is buy a boatload of bitfury chips (im not sure where you get a boatload of BF chips...  actually think there may be a shortage right now) then find a PCB Fabrication outfit that is willing to basically take the design and the asic chips and assemble them into your new usb miners.  in theory, its actually a viable business plan for someone with little to no EE experience, just some business sense and be able to figure out what different files in which format you need to supply to the Fab house.

good luck dude.  if i happen to remember the name of the project i will update.