Scott-
Reno Brake Inc is the place where I found my hydrovac unit.
They handle all sorts of obsolete braking equipment.
Vintage/HotRod is in the culture out here, lots of old iron on the streets year 'round.
I have yet to bolt it on, there's 25-35mph wind and snow outside today. Not really inviting condition for a creep under the rig.
I did however find insurance for about $100/year.
Limited mileage, but seems affordable enough.
Might get this thing rolling sooner than I'd thought!
-John