I was going to say the same thing as Tim. Winnebago uses Moen quite a bit. Winnie doesn't use all Moen but quite a few of their faucets and controls that they use are Moen and if it is, yes, I've heard too that they have a lifetime warranty and Moen will send you the replacement parts.
Does it look like this
and if it does, I'm thinking you should be able to see "Moen" inscribed at the bottom of the spout as illustrated. If not, then who knows.
The one illustrated is a "Moen 7100 Level One-Handle High Arc."