Here's some shots of my CZ85 and the Bianchi UM84 holster I recently picked up for $30. Highly recommended!

Here's a shot with the standard holster flap (just FYI, I'm a southpaw so I reversed the flap - very easy to do!):

Same holster but with the thumbstrap accessory ($10 off of Amazon):

Here's the thumbstrap attachment as seen from above:

And last, I bought the OD green holster from an eBay vendor for $30 + shipping, but when in my local surplus shop on Friday I spotted this used, but excellent condition black model. It was US military surplus and likely saw service on the duty belt of an MP. Total cost - $10:

I spent 23 years on active duty in the Army and carried many a Beretta M9 in these holster and have a lot of respect for the design. I don't think you can do much better for a field holster for a large frame semi-auto like the CZ-75/85 series.