As far as I can tell, there are no actual Bloomberg supporters. If there were I would undoubtedly tell them that they disgusted me.
Y2Kev is probably the one of us most likely to know somebody who might actually vote for Bloomberg, so maybe he can clarify if anybody like that even exists.
But basically I don't think he's really going to run. As far as I understand his plan it's basically "if I'm worried Donald Trump might be president I will run just to beat him." That's very New York style of him, but I don't think Trump has much of a shot in the general, so I don't think Bloomberg will be required.
Everyone I've ever met that might go for Bloomberg would only go for him if Hillary wasn't running and Bernie fucked up big time.
All that said, Bloomberg has no reason to run so long as Hillary wins. He said so himself.