I searched (again) for a couple of hours yesterday for hinges to replace the failing ones on the main door. No luck except Jandi Caravans in Scotland has them. Good enough. Might as well get the parts in Europe, since that's where my Eriba was built. The woman at Jandi who has responded to my questions has been great. Here's their web-site
http://eribascotland.com/
Family of four lives happily in 18 square feet