Last I heard, they're out of print and out of stock - they've been working on revising 'em ever since the Fairbanks office re-opened, but in a volunteer organization, things get done at the speed of volunteer...
When in Anchorage, I checked the flying section in Title Wave Books occasionally, and saw two of 'em pass through - their website doesn't have any listed right now, though. If you're looking for specific info instead of the whole book, let me know - I can copy some it off for you, but I'm afraid I'm not letting go of my copy!