Probably easiest to buy some fibreglass matting from Halfwits and fabricate a new one. (Tape a carrier bag to the inner wing and use that as a former) Spray it black and seal it in place with black goop - jobs a goodun?
Any luck sourcing a replacement or fabricating a new one. Took mine of to refurbish after Christmas , but think the Mrs has chucked it out with the Christmas wrapping paper etc. Tried the normal breakers but no luck there.