2010 Gloucester Door repair

Hi Everyone
   The plastic frame work on my habitation door is cracking up due to fatigue of just plain poor quality has anyone managed to get replacement parts ,I think it is a Dometic Seitz door or has anyone any idea's on repair
Help 
kind regards
Alan

Hi there - We are in NZ with an AS Worcester with the same problem. I have posted on this site  and discvovered ours was  also a Dometic door. AS no longer make the complete door so we are looking at a new Hartel. This will require major work at great cost. Tried most suppliers here in NZ to no avail. The door is OK  -  we really just need an insert on the inside that has discoloured and cracked dismally. Good luck.
Dave