As Terry said, Tom is still in transition. However, he may have some of the buckles and straps from old inventory.
Here in Bozeman you can find replacement parts and straps at the old type Ace hardware stores.
The buckle on my Bison first trip explorer broke last Sunday morning as I left the truck headed out after elk. I had broke the other side five or six years back and the replacement came with both half’s. Luckily for me it was the old half that broke and I knew where it was in the abyss I call the archery/fly fishing room.