how many vacuum pipes on a DZ
 

Right,

The 1985 B2 80 Sport (DZ engine) is a bit hard to start, in one thread (different engine) Phil Payne said to check all the vacuum hoses.

I know there is one from the inlet manifold to the ignition coil ????

Many more to change (before I start poking about under the inlet manifold and throttle body).

Local motor factors, and buy a metre or two of the cotton covered pipe? Or is there a better alternative???

i bought blue vacuum hose from samco IIRC, its just a small boor, thick walled silicone pipe, pretty cheap too, most motor factors should have its in black at least