My basement air is not the same model as yours, but I suspect the capacitors are the same. Get the part number from the Winnebago parts catalog (available online at winnebagoind.com), then google the part number. I got my start and run capacitors, along with the circuit board, and the compressor relays, from MakariosRV.com.
If I can get this to post, here's a link to the Winnebago catalog for your coach:
CatalogI believe the part you're looking for is Part # 105620-10-705, PTCR (Start Device) w/Capacitor. Check out Makarios; they probably have it. And their prices are reasonable.
Here's the part: Coleman Hard Start Kit 8333A9021, $19.88.
