[Flux]

The base is not bought or coated in 35mm but in larger sizes, you can use the 35mm base in medium format cameras,

Then indeed it is a pity they do not offer other sizes. But Impex surely has a better insight which formats sell well than us.

I do not understand how you come to the conclusion that it must be an old emulsion, because it is only offered in one size. You still think that it is an old film with new label?