I would be interested too. The I-Beam apparently uses a special jig set-up which is apparently included with the transducer, which allows the pick-up to be installed under the bridge plate, up against the X bracing and forward of the bridge pins. I've been looking for something for my Martin SPD-koa that doesen't have the metallic sound of piezo, and this might be the answer.

I don't want anything active/with a battery since I normally use a Boss EQ to an ART MP tube preamp/DI (which I think is a smoother set-up than a Baggs) but I'm willing to listen to anything that works.

Sing out Stonewall, when you get it in... thanks.