Thanks for the link.

Did you notice that Vintage Micros are making a batch of Z8 ROMs for sale?

http://vintagemicros.com/catalog/product_info.php/products_id/175?osCsid=ac4254ea4b98c00927d4cfeea8ba9fcc

(BTW: I'm not associated with Vintagemicros, but have brought a lot of equipment off them over many years).

Kind regards,

Macdownunder