Joe,

Check out this sheath. I assume you will say Johnson, but the stitching is so Heiseresque compared it to other Heiser/HKL sheaths in this thread. I know we can't go on stitching alone, but other common features typically associated with Heiser are present as well.

eBay link with more photos





Compared to the Heiser sheath in this photo.





And the different stitching compared to this one.