Bill, I gather some friend of Gordon's is still making them (out of electrical schedule 40 PVC pipe). It basically plays like a tinwhistle.
As I understand it Gordon dropped the bucks for one of those spendy gimmies that read the bore of a tube and tell you where to bore the holes, then quit after a short while.
I'd guess said friend ended up with the gimmie and the jobs. At any rate, when I asked about a year ago, he said if you wrote him at Timberhead he would either send the addy for the whistle maker, or forward your request, I forget which.
I've made six hole flutes out of PVC, and getting the holes in the right place and the right size is the whole trick.
I am following this discussion with much interest. I play Generation whistles, by and large, because they are closest to concert pitch (and tuneable) that I've found -- and when I play with a band it matters. Lots of whistles lack internal integrity (they ain't in tune with themselves), but a really good whistle player once tried to convince me that what happens to the C note in the G scale when you play it on a D whistle is the best part of pennywhistles.
Well, however you finger it, it sure stands out.
And, as the owner of a G chrome Generation, I disagree with Wisely's web page assessment. I have always found that the G is good for long distance outdoor playing. Inside it can remove paint, etch glass, cause fillings to fall from people's teeth and clear a room in under a minute.
I didn't like the Clark's lack of in-tuneness, or the soggy bit, but I haven't tried the sweetones. I'll give it a go.
Blessings,
Barbara