I see that Mazda is making 1100 parts available in the USA for Mk1 models, further to their recent restoration program in Japan. It doesn’t sound like Mazda will do restorations themselves in the US, but they are making the parts available.
I’ve not looked at the list in any detail, but it would be nice if this is rolled out in the U.K. too at some point.
Not sure if the links below will work, I got them from my iPad news app. (Edit: 1st link edited, should work now).