Have you looked at the new Sig Romeo Zero, same footprint as the rmsc, much lower price. But just about as scarce as the OSP. I am still betting that I will have the optic before I find an OSP to buy.
I haven’t been able to find an OSP to purchase, but I already have my optic ready iwb holster from Gunners. First quality and service.
https://www.gunnerscustomholsters.biz/product-p/iwb-w-tuckableclip.htm