gauge install

Here I have some old style GReddy gauges which I have no wiring for, I have been told that in order to use them I need a control unit, does anyone have one for sale ? Thanks

Bought as used on ebay a while ago. I've got the gauge itself, the sensor and the harness for the sensor, but no manual and main harness. Wrote emails for all known SARD distributor and dealer asking for user or installation manual to BUY, got only one response, describing their business policy...