My Plus 8 has a Rivenhood Hood, Tonneau and spare wheel cover and if kept clean and stored dry there are no problems with them and they look more classy than the PVC and no leaks so far.
They are the originals so now 22 years old so don't be put off if you like the idea of Mohair.
I found the PVC one's on my first Plus8 and 4/4 Sport marked up quite badly in comparison.
Mine have all been 9 or 10 stud fitting so not Easy up if that is relevant. at all.
I would give Allon White a call .
