E92 335i Coupe Seat Belt Server Repair

[jon dee 500]

Looking at repairing or replacing the driver's side seatbelt server as the spring that holds the shiny bit on the end has given up. Does anyone have a spare broken server arm lying around that I can practice on before I start messing with the one on the car ? 

Alternatively, does anyone have a good not-broken driver's side server arm (as per pic) that they would part with ? Wellington area is best but happy to pay postage. 

Cheers...

[Herbmiester 909]

I went through this and just bought a replacement from FCP.