My favourite ever whistle flute (I think) is my gorgeous Slovakian low-G double Dvojacka with mounted brass end-pieces and a drone pipe that works as an amazing overtone flute in its own right. It's decorated with traditional patterns etched with acid, and is, as you might expect, the very pip. I bought this back around 1995 from Knock on Wood, which was then under the Dark Arches in Leeds, part of a limited consignment of such things that they had in as I was passing. You can get similar things HERE but they don't look as nice as mine - no brass mounts for a start!

Hope you're having a lot of fun out there anyway, Jack.