I think it's part of the "Dealership" agreement with Sunline that they would honor warranty work needed on a unit they didn't sell.
I've got 2 dealers close to me and the one I purchased from didn't provide what I expected from serviece work and when talking to the other at a show they said they would handle any future work no questions asked.
I'd think the dealer close to you would try and swap for the model you wanted?? like car buyers do.
2004 Dodge 2500 5.7Hemi