There is no freeware A-10 with VC for FSX yet.
There was only one, but it was for FS9 (WebInBlue), and it doesn't work at all in FSX.
There is a payware A-10 with VC for FSX, though. Alphasim or something, I don't remember.
Aerosoft's A-10 is the one your thinking of I believe.
I think they've converted it to FSX by now; if not a true model then most likely ported.
http://www.aerosoft.com/cgi-local/us/ib ... 0,DFS02230It doesn't specifically state FSX compatible, but ask around... Maybe someone will know

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