Where to source parts for Britax sunroof

[jardi1605]

Hi, Just joined piston heads and don't know if this is the sort of thing that should be mentioned on this forum. Does anyone know where I can source a replacement wind deflector for a late model Britax sunroof I have in my MGB GT, have scoured ebay and the web and can't find one anyway. Keep finding older ones to fit Webasto but mine is probably 80's vintage.