I like thumb break holsters such as the Bianchi 5BHL for carrying while hunting or otherwise out in nature.  I've used that style holster a lot and I'd like to get one for my Ruger Blackhawk Bisley but I can't find a single one anywhere for any single action.

Every retention holster I've found for single actions has the strap that goes over the hammer and then snaps onto the body of the holster.  I really dislike that style because they can easily come unsnapped and require too much extra movement when releasing the strap.  

Has anyone come across thumb break/thumb snap holsters similar to the Bianchi for single actions?

https://www.triplek.com/product/440-lightning-strong-sidecrossdraw-for-revolvers/
TrippleK holsters

Andrews Leather does a very nice thumb break.
Andrews

This is perfect, thank you!