I carry OWB. I have Brommeland Def-Con's with matching single mag carriers. If I carried IWB I'd carry a Brommeland Max-Con. I have the same set-up for every Glock I own. That's how much I like it.
Holsters Concealment Systems Gunleather Concealed Carry for Weapons
Gary's leather is very pricey, but represents the pinnacle of the art. He is up there in the stratosphere with a small group of true leather artisans.
I use this for my pocket carry with a G26: Pocket Holsters