It's nice to have so many MEG members joining. Good to have you here.
Yep, the carbon fiber IMRC covers were part of a GB that has ended. As far as I know these are no longer available. You may be able to pick one up from someone that decides to see theirs, honestly, I have only seen one up for sale so far.
Keep an eye on our main classified section (under Common Interests) and maybe you will be able to find one for sale.