Noob question:

I've purchased 3 top-of-the-line Greddy electronic 60 mm gauges from a guy at a good price.

When they were removed from his car, two of them are apparently missing the electronic control box unit that comes with each gauge.

I'm wondering if there are any aftermarket or Greddy manufactured central control units for the Greddy gauges like the DeFi central control unit I've seen advertised, that would do the job. Or, if there are replacement units for the individual gauges that are available.

Any solutions and advice most appreciated. Thanks!