Our night sights for the Taurus PT111 G2, PT 140 G2, 709 and 740 are now available individually for those that only need a front or rear sight.
You are definitely a pioneer. I love my little pt111 and you're helping to make it a customizable gun such as a 1911. You would be good getting a contract with Taurus. PATENT it first then go for it! The recoil assembly is definitely the best I've seen anywhere on any firearm.