Internal decals?
 

I'm going to do a quick rattle can spray job until I can get another shell to a pro to do. I'd like to get some internal stickers to help make it look a bit better. Any idea where I can get some from?

Bolton Model Mart had some odds and sods, But that was a while ago. Maybe worth a call?

I can do some laminated external ones for you which hold up really well, should you not be able to source the internal ones you are after.