I actually got the a quote on a rough first draft model from Xometry. I like them better than ProtoLabs because they generate it online and you get the quote immediately, but I'll likely shop this around locally once I have the design files finished. Xometry gave me a quote of $375 for one or $75 each for 25. Since I'm planning on making it out of 7075-T6 it might be good to give it a Type III hard coat anodizing before paint, that would add a few dollars more. I have a pretty nice 3D printer at work, so I'll probably print it once I'm done so I can compare it to the OEM and check fitment before sending it out to a machine shop.
Could do a 3D scan I suppose, but it would still need design work to make the modifications that I have in mind to secure the lock cylinder (see post #155). I just need things at home to slow down a bit so that I have time to finish the design.