When I got a friend to do a finis code search,2 showed up.
When I enquired the guy went and got it but it was bent in half,called the other dealer and bought theirs which turned up straight luckily.

Have you drove your car with the billet diff mount??
There's been one on mine since I bought it and it makes the diff very noisy,it clunks and bangs and just makes driving the car less enjoyable.
I'm sure you get poly and nylon inserts,mine must be nylon I think as my last cos with a poly mount was ok.