When you export a VC with a unique feature you can just select Custom Name in the Export dialog for naming, then copy the base filename with an added description. Of course, you can only do this with one at a time, but it saves the hassle of poking around and renaming afterwards.
One bit of a gotcha -- make sure that when you are done and are going back to your "normal" Export naming scheme that you change that option back. Forgetting to do so will cause you to keep saving to the one copy (Don't ask me how I know that)
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