'an update on my efforts...
I called my "local" MG Dealership's Service Department in Scotland today - Forum Rules prevent me from naming them - but, good grief - I thought I didn't know anything about motorbikes !!.
The chap I spoke to had "never heard" of "Rollerisation" or a "Kit" to fix it - ffs !!!.
I tried to talk him through what Pete Roper had done and why - silence! - I honestly thought he was winding me up !.
I then (stupidly) asked about how I could go about getting the "kit" supplied by MG, at no cost, given that it was a well established and acknowledged fault. He promptly supplied me with a telephone number for Piaggio Customer Service Help Desk - telling me that it wasn't a Warranty Issue because the bike was more than two years old, and in any case I would have to take any Warranty or Quality issue up with Piaggio direct !.
I dialled the number he gave me and was connected with the Piaggio Help Desk - in ITALY !
After a futile attempt to make myself understood, the pleasant (but confused) Italian said any warranty claim MUST be initiated by the dealer - along with supporting photos / service history etc - just as Pete explained.
I honestly felt that he had no idea whatsoever of what I was speaking and, given this particular dealership have been an MG franchise for at least 10 years, it doesn't fill me with ANY confidence that they could or should do the job !.
My own mechanic says he can and will do it - but obviously - as he isn't any longer an MG authorised workshop - I assume I won't be able to go down the "free" kit road...
I'll get it sorted when I'm home - but it looks like it's going to be a long road !