Prout Owners Association

We have a Prout 46 and have been busy resealing the windows which have started to leak in places. Unfortunately one of the large curved windows at the front corners has cracked during the process - had to be the most awkward one to replace! Can anyone suggest where we could get this replaced. We are currently in Portugal but could also get the window to Spain or back to the UK.
Also any suggestions on the best material to use for replacing this.