While replacing a glow plug, one of my plastic fuel lines snaped. No problem, i order the fuel line, eventually get the right one, and a month later i get the fuel line replaced. while installing the new fuel line, my old brittle plastic vacum line from the vacum pump to the air filter snaps. I'm in a hurry here, so does anyone see a problem with using a rubber fuel or vacum line if i can find one with the right Inside Diameter? i've got to get this thing back on the road.

this is on a 78 240d