I've officially given up trying to find some of these things to put into inventory and leaning to ARF for some education.

I have been trying to find Sig's P320 Fire control units.  These-> https://www.sigsauer.com/p320-fire-control-unit.html

Not a single one of my distributors even seems to have them listed. (Lipseys, Zanders, RSR, Chattanooga, Crow, and a few others).  I heard a rumor from a friend that heard it from another shop that the only way to get them is from Sig direct as a stocking dealer.  Does anyone know if there's any truth to this?

Unfortunately, I'm a home-based 01/03 so big-Sig wants nothing to do with me.  Hoping someone has some insight or maybe I'm just searching wrong.  Seems like a very popular item from what customers are asking for and I'm beating my head against the wall trying to figure out where they come from.

Buy complete guns, sell the frames, mags, box and slide on Gunbroker.

It's been a while, but I saw a stack of them at Adventure Outdoors - They're some flavor of preferred SIG dealer, so that's likely how they got them.

You can get them straight from Sig.