Fantastic PCB
For ZX Spectrum 48K ISSUE 6A Motherboard Replica PCBs
Although the PCB's are fantastic, personally and my opinion only, I find them a-bit expensive when you factor in local taxes and duty payments if you get charged. Specially as the Issue 3B gerber file is passionately freely available and does not need the multiplexer ZX8401 or equivalent chip to restore or new build a broken ZX Spectrum of 30+ years ago.
Response from devzine.pl | March 12, 2024
I try to keep postage costs as low as possible. I have no influence on the customs duties of the destination country.
The ZX8401 chip replacement is cheap and readily available. Its design is open and you can easily make it yourself.