[MultipleParadox]

Tacticalholsters.com

Their Glock 17 holsters fits the TM/WE like a glove

I have an XST for my G18 (Guarder frame, Shooter Design Slide) and it's awesome
Especially with their RTI system that allows for a real quick detach/attach; get multiple RTI wheel for the different locations you want and you're golden

A bit on the pricey side, and made to order so a bit long to get too (4+ weeks)

However, some retailers stocks most common holsters like the glock.

You can try shop.rampartcorp.com (Canadian, superb service and quick)

Edit: the brand is actually G-Code
Will help you if you want to search

XST is their level II line (forgot the level I name)

RTI is their quick detach platform
If you get a traditional holster without the RTI system you don't need the RTI Wheel thingy