Are there Cartier Roadster mods available?

[Dr.Atom]

Hola!

Does anyone know if there are any modifications that I can do for my Roadster?

I was thinking of adding a sec. hand from an older roadster (the blue one)
or getting a clear case back for my watch.

Does anyone know where I could get these from?
Is there a site that has modification parts for Cartier?
Or at least where could I get spare parts for my cartier?

Thanks

-Atom