Bourton overcab skylight

Hello.  Could anyone please tell me where I could purchase a replacement opening cover for the overcab skylight on my 2016 Bourton.  I would prefer not to buy a complete window as it is just the inner skin of the opening part which is damaged, not to mention all the work involved.  Any help would be much appreciated.  A/S tell me they only supply complete windows.  Thanks

I had to have a new rooflight Autosleeper was the best option , There  is a company called ecco  Ltd that remanufacture caravan-motorhome windows  could be worth an ask if they do skylights . Based in Halifax

Thanks molly3  Iwill give them a call .