cmacltd
Have a look at
http://www.caa.co.uk/docs/1594/LTO2539.pdf
Although nothing has subsequently been published (it was nearly three years ago and EASA are still 'consulting'), this is being 'interpreted' as effectively a moratorium on the cross-fitment of parts.
As the Bell and Agusta machines are subject to different Type Certificates (unlike IIUC some US planks that were made under licence in Europe), the 'interpretation' is that there should be no cross fitting of parts.
The biggest problem is that everyone is happy to dole out tea and sympathy to AB owners, but no-one wants to get off their fat asses and do something about the situation.