There's a handful of then on Gun Broker right now. One is actually pretty close to me in IL.
https://www.gunbroker.com/semi-auto-...230&mo=3001564
If you want to stay local, ask your favorite gun shops to keep an eye out for you. Or even put a want add in the papers.
If your shop hasn't found one for you in a reasonable time (&price), then ask them about their procedures if you bought one online. It's really not that bad, and is about the only way to get particular antiques.