Courtesy of Gsxr:

Vacuum line ("plastic" Tecalan pipe, 4mm OD, 1mm ID)
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000-158-14-35 - Transparent (sort of white)
000-158-89-35 - Transparent with red stripe
000-158-91-35 - Transparent with blue stripe
000-997-39-52 - Brown
001-997-81-52 - Black
116-276-06-30 - Black with white lettering
123-276-16-30 - Black with red stripe

Just order it by p/n. The dealer can be a moron.