Around 1985-90 one of the big engine manufacturers (was it P&W?) acquired access to a Gannet to study the noise characteristics of contra-rotating props. This was to collect data for the UDF (unducted fan) engine.
I think that was Hamilton Standard in the US. They used XL482 for a time.
Whatever happened to the one that was being flown back from the US and got stranded in Goose Bay?