Hello Sean, Welcome to the Forum.
After Chevrolet withdrew from the UK/European market place almost ten years ago, the sourcing of parts has become more and more difficult and fragmented.
The two areas of parts availability are mostly via the internet or breakers yards.
As a new Forum member the following link has useful information:- https://www.chevroletownersclub.co.uk/threads/helpful-guidance-using-the-forum.7141/

 

Hello message me directly I run a Chevrolet spare part shop