My Question is about my A/C manifold hose on my 1990 Caddy DeVille

What is your question?

Last summer my mechanic discovered that the A/C hose was leaking so he took it off the car to have it rebuilt, then he decided that we could purchase a new one for the same amount. Well there are two A/C hoses available for that car. They call them 1st design and 2nd design. Neither of them fit the car. Then he left town leaving me to deal with the hot car. I have since found the correct hose after speaking to someone in the parts dept. at the local Cadillac dealership. He gave me the part number then told me it had been discontinued. Fortunately I found one at Rock Auto, and it was the last one they had. My present mechanic said its the right hose but it wont hook up to my compressor and says I need a different compressor. Please can someone tell me if I'm getting the runaround. I've just about had it with this issue.