Yes, you can still get the stuff.
First off, you will have to know if you are going to use the original R12 or R134 refrigerant. The hose is different. If you are changing the system, you may also need the ends that are for 134.
When I did my Vintage Air installation, I had to have the hoses made up (due to having different routing of the hoses than what Vintage Air "standard" set-up.
The best way to find a shop that has the stuff in bulk is to locate a shop that does aftermarket installations. You could ask around the factory dealerships (like a Jeep dealer) where they have non-factory units installed. You could also ask around at the RV shops.
At the same time, you should also ask if they can do the crimping of the end units. This is something that you can't do yourself!
The shop that I found could order all sorts of fittings but didn't have much in stock. The reason I say this is that you should count on having to order the "correct" fittings and wait a week for them to come in.
Technical Reference section
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