I can definetly borrow another crate, but the biggest issue is another heat lamp. I'll scout around and see if I have anything they wont out grow so fast. If not, I do have something else that will work, but the opening isn't great.
It might be possible to put two wire crates side-by-side, and have a single heat lamp make a warm spot in both of them. That would work better once the chicks are a bit older, so they don't need quite so much heat.
You might want to start with them all in one crate for the first few days, even if you do decide to split them up as they get bigger.