Vacuum Line Clamps and Lines

[TM]

Listers-
I don't know if this is common knowledge, but having recently installed
my admittedly ghetto rig boost gauge setup, in the process I found that
the pinch clamps sold for GM turbodiesel trucks (6.2L, IIRC) in little
packs labeled "Help!" at your local auto parts store work perfectly for
the 3.5mm OEM vacuum lines in our cars.

Now can anyone point me to an inexpensive source for the vacuum line
itself? Pete at ZZ Motors sold me some for over $1/ft., I'd like to find
it for less and I'd like to buy 20-30 ft. of the stuff.

Taka