Hi, Seth - the best overall Country lyrics database is Cowpie - Click here for their Loretta Lynn collection, which is probably the same five songs you found elsewhere (and the other sites probably got their lyrics from Cowpie. There's a site called http://www.lorettalynn.com, but I don't know if they have lyrics. It there are specific songs you're looking for, let us know. We have some real experts who can find just about anything you might need.
You may also be able to get something out of thisGoogle Search (click) I've set up for you.
-Joe Offer-