Thanks for everyone's help on this matter. Since my Inglis in an import, I don't believe that installing a "old style" FN part will lower the pistol's value, though I believe that I have located an original Inglis safety. I recently purchased the pistol because it came with an original 1944 stock in excellent cond. The Inglis is very nice as well, all numbers match and the only import mark is stamped on the barrel. I will locate a new HP safety and have a qualified gunsmith install.