I want to replace the head unit in my Range Rover. Due to the factory system having amps in each door you can't just swap out the head unit as it doesn't work.

I need to get a little circuit board with some resistors made up.

This will consist of 8 wires going in one side, going through 16 resistors and then out the other side.

I have full diagrams and some pictures of what is required.

Apparently it can take up to two hours, depending on how quick you are.

Parts would be about $10 max.

Anyone out there want to make this up for me, say for $100?