Ooops. I didn't see this one. The closest to Homewood would probably be JJ Discus in Lockport. His buddy operates their Carol Stream location. The next recommended is Bill and Absolute Discus in Naperville. I prefer you contact Bill first, since he has allot of discus at a fare price. JJ discus has a little more expensive discus. In actuallity, you may even find people selling discus, who are not real reputable discus breeders. I'm not saying these guys are selling bad discus, but most discus keepers keep a big group of discus, which eventually pair up and spawn. So they may occassionally have and sell the babies. JJ Discus & Absolute discus actually sell and breed discus and have been for a long time.
Also, check out SimplyDiscus.com. It's a good resource for discus info and allot of the breeders go there to sell/show their discus.
BTW, which LFS is closing by you?