Vw mechanic required manchester.?

51 plate Vw Passat 2.4 petrol. timing chain tensioner problem has damaged the valves when ticking over in drive. car was not being driven when timing went adrift. But informed it has damaged valves, so I'm informed by vw expert at garade. Need a mechanic who can remove head relace valves etc and repair damaged tensioner. Need a price cheaper than main agent that is unaffordable. If your interested in doing job, not urgent so you could spread the work over a few weeks if you wanted - then please get back to me here. Thanks you.