Use the Panel Selector feature.
Duplicating modules is something we should be avoiding not indulging. How many instances of Monsoon or Clouds are really needed? 15 Monsoons? Really? Would it hurt to use a different black/silver/white/xxx panel instead of the one you own? Can't you upload it in private if you really need yet another alternative? Do you really need anything more than the power specs for a module you have in private?
But doesn't that change the default image for everyone? While I wished people would stop adding separate "whatever panel" versions to the database, I'm not sure the current implementation is sufficient. Or am I missing something?
-- senor-bling
Using the Panel Selector doesn't change the image for everyone. Editing a module and adding yet another image does, BUT the users can then use the Panel Selector to go back to the previous panel they had. It's still there so it's not so much of a problem.
Having the same module 10+ times is more of a problem, so if you really have to choose, it's better to edit an existing version than adding yet another iteration of the same. Unless it's a different manufacturer (e.g. some of the clones have different manufacturers, meh), so pay attention.
At some point I'll merge most "Other / Unknown" duplicates into one and write "USE PANEL SELECTOR" in the description :)