look to be indentical to the ones on my dehler 34 - there is a german based company who supply almost (so far ) all dehler spares - http://www.dehler-ersatzteile.de/- suggest you send them the photo and good luck
I had some similar ones - Rutgerson - on my Mirage. As I had no success with finding new ones, I repaired them using resin and fibreglass. They now seem pretty strong if not as pretty as new ones. It cost me nothing though.
They are Rutgersons taht went out of production. I had the last couple from Arun last year. The "replacemet" is a full batten haaardware replacement job.