I have been satisfied with these for both a Glock Model 30 and a Smith & Wesson SW40VE:
Split Decision
If you prefer no cant:
Hidden Ally
Alter Ego
I never tuck mine, but it is nice to have the option, I suppose. I definitely like the J-clip.
I suspect these also would do well if you don't want the tuckable feature:
Bare Asset
Mr Softy
All of these holsters are stocking items, with no waiting. All should be available for the Glock Model 23.
Good luck with whatever you choose!
