Greydog Sorry Dave....have been on holiday (last minute sun before the winter) for the last week 🙂
riggers I have responded in the Z3 forum section, and I have hopefully tried to convince you to keep it....same reasons as Dave has mentioned above.
It has to be a future classic as they are an iconic style, albeit the Z4 is a gorgeous car, I still don't think it has the style of the Z3.
Parts....sorry, not sure who supplies new panels, only ever bought secondhand panels (in the right colour)...mechanical parts, try Euro Car Parts or GSF as they both do quite a range of Z3 components.
Cheers, Trevor