Looking For A Donor

I am currently looking for a donor car to use for parts for my VIVA.
The cars I have got my eye out for are models with the C20XE engine in it.
Such as;
Calibra 1990-1995
Cavalier gsi or sri 1992-1995
Astra gsi 1995-1997
Vectra 1995-2000

Also as a back-up plan i am looking for a Vauxhall V6 engine
The car with this engine in ti is the Omega 2.5 v6. It has all the things I am looking for and its RWD.

If anyone knows of where i can get one from in the cornwall area please say.