Probably more like the generic uniforms of most private schools, white collared shirts and navy blue pants.
How about this story for the solution to Emmet's materials problem: A Mr. Gordon from the vague Institute for Advanced Thought noticed Emmet's designs on a CAD program at the public library, and his organization offered to provide the needed materials for Emmet's design, in exchange for signing a few documents. Emmet would probably make sure he retained ownership of his design, but wouldn't think to ask about much else.
This Indebted Complication could mean that Emmet owes the IAT (whatever THAT is) a large sum of money, or something a little more interesting (like agreeing to design/build them a nifty gadget or two).