vacuum line missing

I'm in the middle of a 2 year restoration and I am missing the vacuum line that goes from the back of the intake to the trans. I searched mustangs unlimited and cj pony parts and cant find it. Does anyone know what they would call it or a part number.
 
im assuming you are talking about the vaccum modulator hard line. if that is the case your sig says your cars a 65 and its obviously an automatic
NPD has the parts
as listed
65 289, w/fitting on end 7B094-1A $13.95
stainless " "S $21.95

65-66 289, w/rubber end 7B094-2A or 2S for stainless prices same as above

These are all NPD STUFF
their ca depot is 18002353445 their michigan one is 18005216104