Chrome ECU equivalent???

Looking for modern equivalent for the chrome ecu, that is no longer available. Dad had the chrome one with blue heat sink, loaned it out, and it's now mia, (imagine that). Still looking for it. In the meantime, I'm looking to see what else is available. His car will not run on anything less than that chrome box. What are the options?

I think I have one on the 66 Formula S. I'll check to see if I can read any numbers.