Gen1 mirrors - replacements, substitutes or converting to "western style"

[89longbed]

There are a lot of earlier threads on replacing the Gen 1 flag mirrors, but all seem to be about replacing them with the larger, polished stainless low-mount Western style mirrors (XLT mirrors). Does anyone have suggestions for other options? I believe my first driver side replacement was from a dealer and it didn't stay in position for very long, so I went to a catalog Western style (that wasn't good). Is there a better quality black mirror that mounts well on the Gen 1 doors (drilling and patching where the existing mount is expected)? Can you still find good Gen 1 XLT mirrors in salvage yards? Guess I need to see what comes up on EBay.