I know the Bowlus Road Cheif has an interior, very well done too. The entire body lifts off to see it. As for the Franklin Mint Airstream, that's a late sixties model, very well done, but very expensive now. Usually see them go for up to five hundred a piece on the 'Bay. Glad I bought mine from the mint back when they were available. I too wish we could find this builder. If I do find out who it is, I'll post it here. I could do a master for flat sided trailers like the Airfloats pictured here, but I don't think I could ever get the symmetry right to do a "rounded" one like the Airstreams.