I have Rings Blue Guns for a Glock 26 and for the Glock 19. The G26 has been modified by a machinist with a .25" tall by .188" wide sight rail for molding.
I tried the holster making and decided it takes more time than I have to offer. I'd like to get $30.00 each.
PM if interested.
You might check with WRB holsters. Thay make nylon stuff, but they might be willing to sell clips. The ones I've see are about 1.25 inches wide. I can't remember web address, but it should come up on google. They are in Gun Barrell City, Tx.