I'm located on Long Island and luckily have a good hydraulic shop right down the road (Long Island Truck Parts). I'll take the old stuff out this weekend and head down there. I guess I'll probably end up going with some kind of metal line that they have, unless they recommend otherwise.

Thanks Whunter for the pressure rating. That's well under most of the high pressure hoses, as I suspected. And yeah, I can see road debris being a potential issue.