Have there ever been any fake "Topcoats" produced? It seems like an odd frame to fake but I'm not sure.

I don't think the Topcoat ever had the mass popularity to warrant making massive amounts of fakes. Fakes are probably about as likely as fake OTT's I'd wager.

I have only seen one pair of what I thought were fake Topcoats. They were electric blue, and of course, they were on eBay.

there are actually a lot of OTT knockoffs. they tend to have a single bar over the skull, rather than two.

Wow, a single bar OTT has to look ridiculous (slight irony in that, no?) And yeah, that would be a blatant knockoff, If you were looking to buy an OTT you'd know it wasn't real. But in terms of a genuine fake, ie looking like a real one, hard to come by.