Vauxhall engine rebuild

[Rhodr1]

We have a Vauxhall Insignia SRI that has died. Engine has been checked and discovered there is no compression. Garage has recommend getting a replacement engine.

Would rather get the engine in the car repaired, does anybody have recommendations of trustworthy garages in the south Wales area for an engine rebuild? We are in Bridgend, but can take the car Cardiff or Swansea way.

Cheers