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I did mine myself (with a tiny hand from my dad) was eezee. But i spose its a bit different on 16v :p
 
I was charged £46 labour at my local garage, which is one hours work. This was doing it properly, lining up to TDC and checking all the marks.

I found them by accident, they are excellent also.

That was for an 8v, only looked in Haynes but 16v shouldnt be too much more in terms of time?

I would ask people in your area/work about it, usually you can find good garages that way.