Any hydraulic shop, and quite a few NAPA stores can make up new flex lines. I like to use "single braid" hydraulic hose that has a working pressure rating of 3000 PSI. 30-50 PSI engine oil doesn't stress it at all, and it's designed to work at temperatures much higher than lube oil ever reaches.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!