About the only A-10 R/C model that would qualify as ARF would be the GWS version. It is electric twin ducted fan, all-foam, and from what I've read, somewhat underpowered.
It is more of a park flyer with a 38" wingspan. Here's a link:

http://www2.mailordercentral.com/qua...es/GWS1029.JPG

Combat Models also makes a larger foam version that can be flown as a single engine pusher, twin glow ducted fan or twin electric ducted fan. It's more of a builder than a ARF, but it doesn't look too difficult. I just got one and plan on making it electric twin DF. Check it out:

http://members.aol.com/cbmjets/homepage/A10big.jpg

Jesse