I was looking for an extra one of these. One just went on eBay for $26 and shipping, but the seller wouldn't tell me whether it was a cockpit or compact boardset. I'm sure that's why it went so cheap.
If you do find a Race Drivin' compact, I *think* you can convert it to a cockpit boardset with a re-burned set of cockpit ROMs. I think. Jed Margolin's site seems to suggest it, he might know, too but I haven't asked.