I recently also was on a quest for some night sights. A friend of mine suggested I check out the Aro-Tek sights.
They may be made by Trijcon or at least I know they use Trijcon "lights" as their name are stamped on the sights.
Anyway I recently purchased a yellow two dot rear with a green dot front for my Glock 21. The front sight also has the night glow stick surrounded by a day glow ring. Lower profile than most and all metal, no plastic.
They work great and I got them for around a hundred bucks delivered from the company direct.
Check them out on line. http://www.arotek.com/