My fabrication skills outside of a good bodge with tape are zero!If you are after a straight swap seat then you are out of luck. Plenty will fit but brackets and fixings tend to be the things that need the work. There are some aftermarket brackets for the Z3 but are pricey. What are your fabrication skills like?
I'm just trying to stop the top of my head poking above the windscreen!Is your back too long?
If we know the exact problem, we might be able to help.
The only solution that I know of is to increase the height of the front of the seat.
Here's a gif that I made to show the theory of lifting the front of the seat...
These are the Z3 direct fit kits, then you bolt whatever seats you want on them within reason.My fabrication skills outside of a good bodge with tape are zero!