On mine the sticker (data plate) says warning metric bolts used or something similar.
Hoses can be made on order so that should not be a problem. If I would change refrigerant I would use the standard valves so no future shop throws a hissy fit when they have to service it.
If you are determined to open the system anyways you can bring the hoses to a place that can make new ones. Doing everything at once spares you the new dryer, evacuation and refill when something isn’t right.
David