Some people sell the sheaths but you can buy braided stainless covered
hose with the proper ends assembled onto them. The line is called
Aeroquip and are sold in speed shops,high performance boat shops and air
plane equipment vendors.  In Southern California a shop called Earl's
Supply will make to order, at least they used to, any diameter and
length hose you want to pay for.  They also sell premade brake line kits
and radiator hoses.

        DrRfuo
        SOCal-81 vanagon