Mileage Correction - Mini Clubman 2009

[Challo]

Does anyone know a garage that does mileage correction? I have a Mini Clubman 2009 with a replacement tachometer that needs coding to the car. It was showing 106k, but appears to have reverted back to the mileage of the donor car (28K).

I have a quote of £150 from someone local, but seeing who else is available around the Reading Area.