By the way, any opinions on the Reyburn LB C? I’ve got dibs on a D/C LB set.
What about a Jerry Tweaked Shaw or Walton’s C? They’re probably better than a Susato at a reasonable price.
I’ve not had good luck on one occasion with a Copeland C and Jim acknowledged that they had had problems in that key; although that was some time ago and he thinks they have it under control now. It’s the only key missing from my Copeland set and I guess I remain a bit gun shy. Maybe next birthday. 
PhilO
That’s what I thought about, when asking if you were after CM or Dm… Maybe all you need is an extra D tube with a minor scale, i.e. natural F, and if an F# is needed, you can always half-hole the G.
That’s what Hiro got from RR for his Sindt heads… See http://chiffboard.mati.ca/viewtopic.php?t=13256
To see if it can work with you, you may experiment by taping the higher two thirds of the F# hole on a standard whistle.
Depending on the precise type of “minor” D you play you may need the occasional Bb for harmonic or Eolian-- no big deal.
She’s not kidding Glauber, I’ve tried and tried to get that whistle back - to no avail, so don’t even bother. I don’t think she’d sell it even for a grand, which I’d actually consider paying, because that thing is so damn good.
I never should have parted with it. 
(Waaaaa! whining makes me feel better, hee hee.)
Loren
Yes, i gave up on that one. I have very little chance of outliving Jessie.
Many thanks to all who responded! My answer ended up being… none of the above! A D/C Reyburn set came up for sale for a good price and i bought it. Hopefully it will do the trick. But i will keep the Copelands, Burkes, Thin Weasels and the others in mind.
I’m sure JessieK did post a reply. Then it vanished in the ether. I know I should stop white wine with crabs: crabmeat makes me see strange things. Meanwhile…
It suddenly struck me no-one mentioned Dave Parkhurst’s high whistles.
Superb whistles, truly handmade and at a steal price given the work and sound…
Funny how brands here get hyped or disdained through fad cycles.
Reyburn’s high C is very nice, as is Abell’s. I have a Jerry-tweaked Shaw C that’s quite fun to play as well.
My Reyburn C is part of my raffle prize . . . I got the D/C set with an extra D tube. (Thanks Reynaldo!)
Stuart