Horigan Urban Forest Products — almost to Waukegan, "over 30,000 board feet of kiln dried, local, reclaimed, urban lumber", the PS:One wiki says they have hardwoods
TODO: visit — Woodcraft — Woodridge / Downers Grove
A used furniture + lumber resale place (furniture could be used to harvest lumber from):
TODO: visit — Rebuilding Exchange — near Fullerton and Ashland and I-90 — all kinds of reclaimed furniture, fixtures, and lumber — TODO: check it out, do they have much hardwood, even if it has to be harvested from already-built furniture?