FG - the only other thing I could think to do is to get a sight from Brownell. They sell marvel sights in all heights.

Something we used to do many years ago (Back when there were no adjustable sights), was remove the front sight and sodder a silver dime on them. Those silver dimes were easy to trim, and back then not worth a dime... We'd cut one end flat, almost in half. Then sodder that dime on it. With the ruff edges there is no glare off them and you can shorten them down as much as you want.