Z3 3.0 are getting rarer and rarer. Mine is a 3.0 and I got lucky with a chap around the corner from me having a really late model wanting to basically just get shot as he hadn't used it in years, struggingly to get in it with his advanced years.
https://www.howmanyleft.co.uk/ looks like there are around 1000, Z3 3.0's out there but alot more 2.8's
Good luck with the search, something will come up!