Well I don't know such tool but I can only say image searches suck - I got yahoo on my mind but most likelly google's too. One of my pages is indexed on 7-8 th place in images.yahoo.com since a month or maybe more, I get more than 250 image searches hits daily and guesss what... I didn't make a single sale of it..
Of course its free traffic but IMO its not worth the effort, its better to focus on 'standard' se optimalization. (and be happy if any of the images get indexed itself like it happened in my case)
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