For the most recent one I rebuilt, I had to call several hydraulic shops and visit several others before I found a hose that would work. I did eventually, though. What I learned is that the pressures are not that high and there are thinner walled hose products available that will work with those fittings.

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1985 300 TD 448K
1984 300 TD 278K

1983 240D euro 240k
1994 f-250 idi turbo 330K
1986 f-350 IDI
1987 F-350 IDI

1985 JD 1050 4wd
1965 IH 3660