I don't have a dog in the fight (not my auction and I don't currently own a 4506 ), but there is one on Ebay right now. Great holster!
Gonzo

Milt Sparks makes some might fine holsters. I wish could afford one for each gun.

My personal experience with the 60TK was with a steel framed 1911. It just sits too high for such a heavy gun. It carried the butt too far away from my body and was difficult to draw.

If I remember correctly, it also creaked a lot.

I limit carry to heavy autos like that and the 4506 to IWB only.

I bought one at the Gunsite pro shop when I took API-250 in 1987, for a lightweight Commander. I like the high-ride feature,as it lets me keep my elbow nearby to cover it and let me know it's still there. The belt really needs to be stiff to keep the butt in tight. 20 years later, some of the stitching is unravelling. They won't repair/restitch, so I'm looking for a local shoe repair guy that can.