You don't mention if you're looking for a factory Veglia gauge or aftermarket. Panteras did not get factory oil temp gauges but Mangustas did. It's in the oil pan and takes a Veglia sending unit.
For my Pantera, I used an aftermarket Autometer oil temp gauge with TWO Autometer senders. One is in the Aviaid oil pan and the other is in a drilled/tapped hole in the ZF, with a two-position selector switch. Works fine.