Thanks for the replies. Sig's website doesn't have any sight heights other than #6 and #8, which I've tried. I think I need a #10, which Sig's sight height charts reference, but I can't find for sale anywhere. Dawson's sights are too big. I'll use them if there isn't anything else available that looks more like stock sights.
Are there any recommendations you can think of other than TruGlo, Dawson, and Trijicon?