Bought a dust shoe
http://www.ebay.co.uk/itm/80mm-White...72.m2749.l2649

Think it's the same as you linked to just different colour, but UK ship although slightly more expensive.

I'm going to use a vacuum cleaner to suck on a cyclone wondering if I can use 100mm fittings on the cyclone to run a 100mm hose to the dust shoe or should I make an adapter so I can run a smaller hose to it.

Hmmm decisions.