My local guy here is not the greatest, but as previous poster said you can do fine on-line. There are many to choose from.
Just bought a carbonating setup last week from Keg Connection in San Marcos, TX -- I know, too far for you to drive but they're about 40 miles away for me. I went in person because I had a LOT of questions, and the guy in charge took his time with me, got all the hoses, adapters, fittings, tank, regulator, faucet, o-rings, etc. that I needed. I'm sure they can help by phone just as well.
They are cheap on shipping too. Used / refurbished, and new kegs.
Not a fancy store, so low overhead I guess. Great website, too.
a setup like this for instance:
Love the 3-gallon new kegs.
disclaimer: just a satisfied customer of theirs!