Remanufacturing Service or DIY Kit for Obsolete Automotive Resistor Cards

The person needs a resistor card for a 1988 car's fuel sending unit but can't find one because they stopped making the parts. They're asking how to test the ohm range to find a similar one. This opens up an opportunity for a niche service: "Vintage Auto Electronics Remanufacturing" to reproduce these obsolete parts. Alternatively, a "Custom Resistor Card Kit" with materials and guidance for DIY enthusiasts, or an in-depth "Guide to Rebuilding Fuel Sender Resistor Cards," would be really helpful for classic car restorers dealing with unavailable parts. The benefit? It keeps vintage vehicles on the road by providing those hard-to-find, critical components.