Bausch & Lomb / Bushnell Discoverer 22-3030 Telephoto Adapter for 60mm Discoverer Scopes

This is a difficult item to find and so is expensive, on the other hand this is the only way I have found to attach an iphone camera to a B&L 60mm Zoom telescope in mint condition (in original box) gifted by a neighbor. I have it on an iOptron Cube Pro Alt-Az tracking mount and hope to capture Deep Sky Objects with it as soon as the weather clears and I figure out how to incorporate a suitable light pollution filter. Another option is to use this adapter with a custom adapter to allow use standard modern astronomic cameras. Anyway, great fun.