If you decide to splice with rubber cooler/PS hose, try to find fuel-injection hose-clamps, as ordinary fuel-lne screw-clamps tend to chew into the rubber hose.
Alternately, if your metal line is very close to an SAE size, (e.g. 8 MM = 5/16", 9 MM = 3/8") you may be able to splice it with a brass compression union, availible at autoparts or hardware/plumbing stores.
Of course, any splice will require relocating the support bracket. Wrap the metal line at the new location with some rubbr hose or several turns of electrical tape to prevent future damage.

Happy Motoring, Mark

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DrDKW