I've just downloaded one of your WeatherGens books and like what I've read so far! I agree, it lends itself to animation. I guess you will have to send a synopsis out to as many animation production companies as you can and hope that one of them will take up the option. As to contacting Gavin - you will find his email by clicking on his name in any of his posts on the Forum, as long as it is in red (this is a direct link to an email doc)- try his post on the 'Gatherings' section of the forum. I'm sure you're right that his voice would be ideal for a WeatherGen!
I've been thinking ahead as I retire from teaching this July and voice-over work is something I'd love to do - I am hoping to record for Talking Books if they'll have me: reading aloud, particularly to children, is something I really love doing.
Good luck with getting your books turned into animations - don't give up!