Thanks for all that info,....more than I found. I feel more confident now that I did order the correct RH latch.
As far as PNs, ebay doesn't do PNs, just photos.
I just checked google again, and this same swing door entering a house is a LH door. So I believe it is safe to say an RV door is exactly opposite hand of a house door.
Now I have been told by a building contractor that the heavy steel entry doors on commercial buildings is exactly opposite hand of a house door.
We can get to the moon, but we can't have a standard on the handing of a door ???