I'm of the mind that repair of this is not difficult. the collar can easily be ground off, the problem is that the hose is a size that's not easy to find. it's around 15mm ID, and NAPA does not carry that size in oil pressure hose. It can be ordered though.
I'd like to find a hose clamp similar to what's mentioned in the top of the thread. another style would be a finger/collar clamp... I'll cogitate on the issue... because those steel lines are annoying to say the least to install... I did it without lifting the engine, but had to pull the A/C boss to do it.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!