Whistles to trade

I have a Burke brass pro high D, a Burke composite low A, and a Silkstone D-Plus alloy: I need either a Cronnolly high D or an Overton low D. Anybody want to do a deal?
I can be reached at: j_michaels@juno.com

I know the Cronnolly whistles are loud and take a lot of air (designed with flute players in mind…), but do they also have a good amount of resistance/back pressure?

-brett