So, after your last post, I emailed Tommes who allready has 3D-modelled the 1351 and owns the molds of the C64C about what Philippe Lang is going to do. Perhabs we may bring them both together in a business relationship and a technical exchange, so the molds will be produced in an universal kind to be used not only with an Amiga-inlay.
That's great news - with a bit of luck (and some more coordination efforts like this! ^=^), Tommes and Philippe will be able to sort something out for the benefit of the entire C64/128 community!