I did find a rebuild kit, but I decided what I would do is buy a replacement valve and just use the half with the seal, and the new blade.
This way I at least get 1/2 of a new valve :-) .
Vintagetrailersupply.com seemd to have the best price.
BTW - I did not remove the belly pan to do this. I managed to remove it through the access pannel. This did require some gymnastics, especially the part where I hacksawed through the 2" gray water drain line in order to get the valve out. I will reconnect that with a rubber sleeve.