Hey there mate. Mine went to Nissan and got it fixed. That's where the service manager told me they do 2-3 of them a month. Mine was done under the stat. warranty from the yard I bought mine from, so I got lucky there. I can't say what the labour was worth, as I haven't dealt with the paper work side, but it took them 3 days to do it.
And they broke a few other things in the process... Collateral damage.
I should also mention, that when I was doing the rounds for this job to get done, a few mechanics told me to not bother fixing it... Just keep an eye on it and top up as required unless it is seriously bad. It can be a hefty job depending on how they attack it. Some even mentioned taking the motor out. The motor came out on my one as they put in a set of new engine mounts in the process.