Lower parts kits OOS everywhere

Been waiting for M5 LPK (no grip no FCG) for a few months and they have been OOS everywhere.

Any one got the scoop when they will be back? Last bits I need for my build and of course there are a few of those that seem proprietary.... Unless someone knows of substitutions?

At the point, I'd source the pins by themselves if I could and I dunno is the bolt catch also proprietary?

u/AeroPrecision - any insight on timelines?

Anyone else... Options?