Bulman Gunleather, as shown in the above link, although the model shown doesn't have a thumb break. But enjoy the eye candy!
For a more mass-produced holster that won't have a long turnaround time, I suggest a DeSantis Thumb Break Scabbard. I have their equivalent in a paddle style for my Sig 220, and the ride height isn't ridiculously high. The trigger sits right about at belt height.
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