Agree - europaspares would be my first port of call - very knowledgeable people there an Aladdin`s cave if in the Burton on Trent area (but not the easiest shop to find - it is a mile or so out of Tutbury & hidden on a cul de sac of an industrial estate.
If no joy there try Uncle Melvyn (Rutter)who has a large stock of Mog bits.
