It is over a year ago since I was invloved with this SB so can't remeber the exact words but as far as I remember it is madatory for the Pilot seat (EASA maint.), all the aircraft I was involved with had it done and parts paid for by Cessna and some allowance for labour as well
(Cessna service centre)
You are also correct it is now out of time for Cessna to foot the bill!
Pilot DAR:- The seat belt arrangment you have seen is the latest kit from Cessna.
It is also recommended to have one on the right hand seat but you had to buy your own.
I would be annoyed as well, this should have been picked up (EASA G-reg) when you had an airworthiness review when going EASA and all SB's AD's were checked from birth.
Mind you I have been shocked at the varying standards and interapretation of the SB's, lifed items, props, pitot static lines, seat belts etc. etc.
