Thanks everyone- really very helpful.
At home I have realised I have the Flat 4 caps and some MWS- must have bought them at same time. The writing it a little thicker and they are slightly too small though so worth keeping on my search.
Restojohnny- Thank you for the head sup. If the genni one out of the 5 is the "patinad" one I am trying to find something in slightly better condition now that the wheels have been renovated- but thanks for the thought- much appreciated.
Will try and contact the FAT guys and use some silicone to put the remaining ones back in this time. When I tried to contact FAT last time I realsied they dont list an e mail address so I look forward to calling them this week and trying on my best "Posh English" accent.