I'm not quite sure what you mean by quick connect fittings. The fittings on the PS hoses are similar to a flare fitting (think a giant brake line), except that instead of a flare, the tubing has an upset ridge with an O-ring for sealing. You can get the O-rings, as far as I know, but that's the only replaceable part. If the lines are rusty, they will seize to the fittings, and twist when you turn the fittings. New hoses aren't terribly expensive, and I would not try to fuss with fabricating your own if you need a new one. Clearances are pretty tight, especially where the lower radiator hose crosses the PS lines, so they have to be a good fit.
If the hoses are good, and if the fittings turn on the lines when you remove them, I'd just reuse them. Make sure the O-rings are good, and replace if in doubt. If the fittings are rusted on so badly that you twist the tubing, you'll have to replace them. You might get away with the return line even if it's a bit tweaked, but the high pressure line had better be good.
I've had a high pressure line rust through. Not worth the stranding and emergency expense if you're in doubt about condition.
