I'm not much of a Pipe & Taborer, but I did make a taborer's pipe from a Generation D whistle. I bored through the third hole with a bit the same size as the hole and made a hole in the back of the whistle. I then covered all the holes on the front of the whistle except the bootm two.
I'm curious as to what kind of drum you expert (or more expert than I) Pipe & Taborers use. Mine is a twelve inch frame drum with no snare.