I always like having a go so I ordered the cheapest I could find which was from a seller in the usa via etsy. At the time it was 180USD with free shipping to the UK. But had to pay around £50 in taxes.
The material is actually pretty good but the back window is laminated in so not stitched and looks a bit weird.
You get what you pay for.
But for me it's fine. Top down in summer otherwise hardtop the rest of the time.
Fitting was reasonably straight forward. Lots of info about fitting on the forum
Ignore the different body - it is a bog standard Z3 under there.
Was always my plan to get a better roof when my rebody is complete. Would I fit it myself? Probably not. For the price Jack Smith charges it just doesn't make sense to do it yourself more than once in your life.