FIAT 130: Revising Climate Compressor

Moin, my FIAT has a new air conditioning system, where the compressor should be revised. For this purpose, I googled a bit with the name of the manufacturer and the model name, but somehow I can’t get any further. Maybe you can answer my questions, at least in part: – If I know correctly, this is an York compressor, the Italian on the type plate has probably built the compressor only in license. Is that right? – Where do I get for the Brummer n or who could revise the compressor so that I can also operate the air conditioning system with R134a, and what would cost such a thing, quite roughly? – Where can I get a dryer with these connections (see pictures)?