The ZX-Spectrum ZXMMC Interface's page
The very first prototype's pcb is "home made" (see picture on the left). The process is quite delicate due to the 0,3mm track width and tiny vias.
For this reason, a small batch of "real" PCB has been produced and can be requested here, or you may send the Gerber files to your favourite pcb manufacturer. A printable image version is also provided, for those who wants to print the PCB at home.