He also produces preamps and direct boxes for use with his and other pickups. This site provides price and dealer lists, and contact information. Donnell Enterprises manufactures and sells high-quality internal mics for acoustic guitars and other acoustic instruments. Their mics are mounted on mini goosenecks allowing easy position adjustment. They have models that clip on internal braces, or that mount permanently via a soundhole jack.
Most models are battery operated.
A web site is in progress. Online users of his acoustic guitar mics rave about them. There is also Joe Mills Mini Mic info at the Highlander Pickups web site. Trance Audio Trance audio offers high quality pickups and preamps for amplification of acoustic guitars. Their Acoustic Lens pickup is the successor to the famour FRAP pickup, and Michael Hedges uses the Trance Inducer preamp with a FRAP pickup.