OK, I went and bought that converter on kijiji. It is exactly the same as the Progressive Dynamics converter, but labeled Apache. Looks like Progressive Dynamics relabeled their unit for the Apache pop-up trailers.
The part you require was broken. I may have broke it. But with some bubble gum and bailing twine, I fixed it. In the pictures the brown one is the broken one I just bought. The grey one came from 45-1100036. I did not take before pictures, but the little hook you see on the grey one was sheered off, on the brown one. It is a tab that is bent up from one of the sides of a five sided box. Each side is like one of four tabs that when bent up form the box. I soldered some tin from furnace
duct onto it. In the process, I broke off one of the tabs that make up one of the sides of the box. The end of the fuse is still gripped firmly inside what is left of the box. The bent tab, on the top side of the box, is about 1/16" wide. This was like making jewelery.
I offer you the unmodified grey fuse cover. I will PM you.