It took me a long time to find the bezel I needed. I found it at British parts Chicago, but I would never buy anything from him again, he tried to scam me out of a set of silencers and I had to get the Cook County Attorney General after him before he would credit my card, it took me almost 2 years. The bezels must be available somewhere. The instruments aren't that hard to work on, you just need to be real careful and the parts may be hard to find if you need any. There are a couple of online instructions and at least one book out. There is a book at lulu.com that is about repairing Smiths instruments, I think it is about $22USD. Walridge sells the 3 rubber gaskets and the screws, they are a bit pricey.
I was lucky, I just needed the bezel.
Dave
69S