Instrument Cluster Voltage Regulator
Found these kits on the internet. $7
http://www.engineeringshock.com/lm317-variable-power-supply-kit.html
I like the idea of the printed board if using the capacitors. Wouldn't need the 4 diode bridge, and would it be okay to swap in some capacitors specified in ChargerSource above (tantalum polar capacitors)? The 1 uF 50V was not on the shelf at RS, but availible at Mouser.
Three RS's by me are going strong. One worker thought Sprint was going to buy remaining stores?