Phil carries them here. I know you want to do it now, but I bought my set from him and it was like $8.00 with a couple spares.
Get a good grip on the hose and pull, it will come off.
-nB
PS, welcome to the group. I got an 83 DT for my first diesel too and had the exact same first question
Dearship wanted $80 to change those lines out
-nB