Check Euro car parts... I managed to get a few composite ones for one of the 998s... you may have to play with registrations as my 85 didnt come up but my 88 did (come up with the HG...)
FAI are the manufacturer ECP stock of the composite ones.
I did see the ECP ones but wrote them off because they are less than £5?!
Either a massive bargain vs the Payen ones or as good as a bit of cardboard with some holes in..
https://www.eurocarp...371cf7d4
FAI stuff is normally alright so it might be worth buying and trying especially at that price.