FWIW I have a few leftover No.4 front blades in the following heights if anyone needs them:

-.030
-.015
0
.030
.045
.060

I am not in "the business" and not interested in selling the lot, but will GIVE AWAY single sights to anyone who knows which ONE sight they would like. PM me with your address and it goes into an envelope. Gratis to help the game.