Couple weeks ago, I got the last Gen 3 they had at HiTek Firearms in Sellersburg, and I haven't seen too many since then. Although I didn't specifically look for any while I was there, Keislers/Orion Arms in Jeffersonville had a pretty good selection of Glocks in-stock late last week. Might be worth giving them a call, see if they could transfer one to a local shop for you.
It seems like its hard to find anything these days...