The Agusta Bell under EASA can only have Agusta parts fitted, NOT Bell parts, so all those unfortunate people who have Agusta Jet Rangers with a mix of parts are now flying them illegal. Agusta dont seem to want to support the ageing product anymore and the parts supply chain is drying up rapidly. Ironically if you need say main rotor blades (for example) they come from Bell and shipped to Agusta who then issue you with their correct paperwork which states that they are now fit for purpose, but beware this does not apply to all parts which appear to be common.
I have just come out of a B3 which the CAA revoked its brand new c of a and has had to have EVERY Bell part removed/replaced. Some parts were no longer available and had to be sent away for NDT testing for the manufacturer to issue the release as new ones were not available. This is obviously a European problem.
If in doubt contact the CAA who have all the information.