Shoot out an email to you faculty. They never know what you need unless you ask. We have gotten TONS of donations from teachers and friends of teachers just by asking. Also put out requests for "special items" (we needed a 1950s stove once) on Craig's List. If people see that it is for a school and you are willing to come get it, they will probably give it to you. Also, offer to write a donation receipt. Hope this helps!!