Some press clippings on Centro-Matic. They're not a country band in the traditional sense, but they could certainly record a song with the sound from this ad.
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"It's unforgettable in a Neil Young or Jeff Tweedy kind of way… As multifarious as the indie rock canon it's practically everything: from the South, in the basement, smoking pot, on the porch, plugging in, plucking soft and clocking out. It's a hootenanny of sweetly weathered proportions, free-wheeling clap-alongs and perfectly boozy balladry - not to mention ass kicking pop songs about rotary wheels and shotgun shells. Love You Just the Same is what a trucker cap would sound like if it could sing. Oh, and play violin." -- Magnet
"HOT LIST! Oct 2003 - Country twang with a pinch of emo, held together by Will Johnson's raspy, searching voice. It's hearty, stick-to-your-ribs fare that makes you proud to be an American." -- Rolling Stone
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Anyways, Centro-Matic is a very fine band out of Denton, TX. I've seen them open a couple of times for southern rock hosses - the Drive-By Truckers. Pence is an impressive drummer to watch play live, which he does for Centro-Matic, but he could use a facial hair consultant. As mentioned, he does other work I'm less familiar with. I don't know any specifics about what involvement they had with this ad, which does feature a cool sound.