Frazod - that polymer Glock holster, they make in 2 sizes. Be sure you order the right one for your gun. Midway usually has them in stock in one size or another, they're cheap enough I don't get too bent out of shape if they're higher than elsewhere. I've seen these @ gun shows and so on for $8 NIB so if you're in no rush shop around for 'em. Note that they're set up for a thin belt 'as is' with several plastic beads that can be removed to fit a wider belt. This is one time you want to keep the holster-to-belt fit as snug as possible, as it'll make your draw a bit quicker/smoother.
http://www.youtube.com/watch?v=ikZz4d0P2Jc