It worked for me on a temporary basis long ago when I wanted to try an ounce and a sixteenth for some reason I don't remember.

Parts for your loader are going to be difficult to find.

A more permanent solution may be to make a sleeve for your bushing out of some kind of tubing and epoxy it in place.

Necessity is a mother.

"The price of good shotgunnery is constant practice" - Fred Kimble