These guys are BMW breakers:
http://www.bmw-spares.com
There are few more all over the country.
A seller on ebay called Fleabagmonkeyface (I think) breaks Z3's, just check on ebay for people selling Z3 spares and message them as they don't list everything
Another breaker has recently joined on here and had some Z3's, don't recall the name will look it up.
If you lucky you should find some tatty non sport seats for sale and then just swap whole base with motor and all (te seat itself come off the base with a few bolts I recall).
http://www.bmw-spares.com
There are few more all over the country.
A seller on ebay called Fleabagmonkeyface (I think) breaks Z3's, just check on ebay for people selling Z3 spares and message them as they don't list everything
Another breaker has recently joined on here and had some Z3's, don't recall the name will look it up.
If you lucky you should find some tatty non sport seats for sale and then just swap whole base with motor and all (te seat itself come off the base with a few bolts I recall).