This is the closest I could find currently on sale, but you'll have to buy the whole gun.
http://www.gunbroker.com/item/641150156
I don't know if I'd buy a Glock with a slide Duracoated in stainless color. I have used the stainless color Duracoat on a gun and was not happy with the result. It just didn't look right and once the finish started to wear, it looked really bad. I've never heard of an actual stainless slide for any Glock. What I do like though is the NP3 finished slides. I had a G19 with that and my current G23 has the NP3 finish. I should send my G21 out and have it done there too.
This is mine:
Does anyone know where to find a Glock 43 stainless slide?
You could always go with an M&P?
The Glock 19c is so sweet. Takes back so much on the recoil. Makes for great accuracy.