This might be outside of the scope of what you're looking to do, but my absolute favorite resource ever for country music is a book by Brian Fullen (with Roy Vogt" called "Contemporary Country Styles for the Drummer and Bassist".
In that book and accompanying CD, produced in the 90's, they cover 12 different song forms, which they call "Focus Grooves": Country Pop, Rock, Funk, Two-Beat, Train Beat (medium and fast), Cajun, 3/4 Waltz (straight and shuffle eights), Ballad (straight and shuffle eights), Shuffle, Rock/Shuffle, Western Swing, and 12/8 blues.
For each "focus groove", there's a brief history, an original track recorded with studio musicians with playing suggestions, written charts and variations, and a recommended listening list (mostly 80's and 90's radio-songs, due to when the book was published).
You can see and hear examples on Brian Fullen's site, here:
http://www.brianfullen.com/countrystyles.htm
What I love about this is that it's a very comprehensive, well rounded, and well thought out book/CD package for folks who really want to understand the musical styles, instead of just buying tabs to random songs.
If I could find something like this for pedal steel, I'd be in heaven!
"No officer, I don't even own a cat... "
...Not!! LOL