I have never used an auto but what about if you take the fittings/old hoses to a hydraulic hose shop that makes stuff for tractor trailers like those Peterbuilt trucks.
I am sure they can make you a hose that will stand up to ATF and be in all in one piece with clamped fittings. I have found doing this works out cheaper than buying AN fittings and hoses individually.
Just a suggestion.