Just wanted to pass along a tip for those that are still struggling with ill fitting sheets on the Bambi.
www.sheetsusa.com is a US company that manufactures customs sheets for RVs (and Airstreams in particular) in Nebraska. They have a really neat design. The top and bottom sheets are attached at the foot. The bottom sheet, at the head, has a pocket that ships over the mattress, then the sheet set is pulled to the foot, tucked in and locked in place with velcro in such a way as to form another pocket. No elastic used. Once the bottom is locked in place, the top sheet is then pulled back to the head and there is NO way that either sheet can be pulled loose. The design incorporates the rounded corners of our beds. The price is $37.10 and that includes 2 pillow cases. The quality is top notch. Highly recommend.
Also, they have custom sheets for MANY other A/Ss so check out the website. If you don't find your exact model, give them a call and talk to Deb as they may have patterns already, just not showing on the website (that was the case with the Bambi). Really nice people to work with.