look for the smaller auto parts stores. advance/autozone/pepboys suck. they would rather take up floor space with cheap, chinsey LEDs, spinner hub caps, fuzzy dice, and faux braided steel hose covers to make it LOOK like you have braided steel lines, instead of having rolls of vacuum hose, fuel hose, heater hose, etc.
but the small shops like Napa that has the old greasey guy behind the counter who also operates the brake lathe and mixes up automotive paint and knows how to use a paper book to look up parts, will often have hose, steel brake lines, etc. in bulk for you to buy by the foot.