When we got back from our latest trip I found the curved glass divider that sits (on post 2010 Eribas) between the hob and the rear bed/seating, lying on the floor. Luckily it hadn't broken. The plastic screws in the metal retaining clamps had either lost their little clear "grip", or become so rounded that they couldn't be tightened up.
The bracket on the caravan wall had also fallen out and I glued that back in with Gorilla glue, which is also holding strong..
I searched for some replacements that would be cheaper (and much quicker) than going to Hymer and I eventually found some that look almost identical. They are sold by a company called MilanCentral on Ebay for £5.75 for four complete clamps and screws. They may sound Italian, but they come direct from Hong Kong remarkably rapidly. They seem to be a direct replacement for the knackered genuine ones and I am hoping they will do the trick - very good so far!
Simon