Finding a Commodore 64 250466 motherboard

This is my beautiful old Commodore 64 “Aldi” case and keyboard I picked up in September 2023 from a seller in Germany: Note the somewhat unusual combination of beige keyboard paired with the darker breadbin case. When most people think “Commodore 64”, they likely picture a dark brown keyboard similar to later VIC-20 machines. This unit was sold in Aldi in Germany, and unlike the later 64G, had a double-shot keyboard with PETSCII characters printed on the front. My unit would have originally been a charcoal grey colour, but it’s developed an oddly pleasing Farmers Union Iced Coffee patina which I can’t bring myself to retrobright. I expect South Australians get that reference, and nobody else. My plan had been to use this as a testbed keyboard and case for a modern reproduction board, for which we’re spoiled for choice. I thought it’d be fun to hand solder a faithful reproduction board myself, then source some modern replacement ICs. Alternatively, I could try one of the new FPGA…