I was doing my usual eBay trawl and came across a listing for a collection of 18 whistles at a very low price, so I bought them.
The were mostly Generation and Sweettone in various keys. To my surprise there were 3 tabor pipes among them, an Overton in A, a Sweetheart in D and a Generation in D.
I knew that Generation made tabor pipes, but the Overton and Sweetheart was a pleasant surprise.