I was in a crash recently and ruined the rim on one of my "race wheels". It was an American Classic Sprint 350. My LBS doesn't carry American Classic and the only thing I've found online (ebay, etc.) for sale is the full wheelset. Any suggestions on where to find a front wheel only? I want to keep a matched set in case I need to sell them one day.

There's no practical reason your wheels have to match, and it's common to replace just one when you ruin one. I think only one of my five bikes has matching wheels. But any decent shop should be able to order whatever you want and build the wheel any way you want it.

The Velocity Fusion rim has about the same rim depth and ERD as the American Classic Sprint 350 rim. I'm sure your LBS can rebuild your front wheel with a 24 hole Fusion rim for a nominal cost.