Looks like T.G beat me to the humidifier link.
The site he posted is actually $100 cheaper than the one I put up. Can't really beat that Cubic Foot support for only $230.
Distillers aren't cheap though, as an FYI. I've never really shopped around other than the ones my FiL sells, but even the smallest ones will set you back a few hundred dollars, and one that can do 10 gallons a day will probably start around $1500.
You might be able to find one that can do around a gallon a day (can't see the humidifier using more than that) for around $500. Just make sure it can hook up to a pump for the auto-feed.