Polymer80? Yep.
P80 80% Pistol Frame Kits
www.polymer80.com
Lots of places sell them, but my distributor has been out of stock for a year. So, I got one from jsdsupply.
Does the PF45 have the 1911 grip angle like the GGP frame you posted above? The P80 listing just sez "enhanced ergonomics and features". Kinda vague...
I checked GGP after your earlier post and they only had the 9mm frames.