I finally got my nasty accordion style shower door replaced. That thing has given me trouble since the day I got the trailer used in '08. The material was too stiff from age I guess so it would bunch up and jump out of the track if opened very far so I would have to squeeze through and could never fully open it without a lot of effort to keep it all inline. I have wanted a SHUB II by New Line for a long time but they are quite expensive. I finally found an ebay seller selling what they called a SHUB II but it cost a lot less. Well it turns out it's actually a Roller-Box by Fivent.
There are more pictures at the link in my signature.