It's probably a DURA faucet or a PHOENIX faucet. Both are "low bidders" in the RV world and build a "pretty good product" but it's not a big seller in the S&B world, so you'll probably not see any repair parts in most hardware/building supply stores.
You can look up DURA faucets here:
http://www.durafaucet.com/
And PHOENIX faucets here:
http://phoenixfaucets.com/
Parts are readily available online, but you'll need to determine what you have before you can order what you need.
For most of us, it's cheaper and easier to replace the faucet with a S&B model rather than try to find parts that aren't usually returnable.
Typically, RV faucets are either plastic or a base metal, so they aren't known for their ability to survive freeze damage which usually cracks the body as well as damages the interior components.
You might get lucky ordering parts, then again, if there's something your DW likes on the Lowe's or HD clearance shelf.........