Just like Mike Porter said, NTS Pro Media is great! They are on Music Row just down from the Curb building. Give Mike or Nancy at NTS a call and they'll fix you up. They usually have a good supply of 2" and 1/2" tape in, as well as other formats. They also carry a good selection of nice hard drives and offer some other good services as well. Good folks to know about.
check out www.reeldealpa.com
They claim to have a lot of Quantegy tape in stock, although the last visit I made there it seemed they didn't have much GP9 or 499 left especially in the desired 1/2" & 1" format.
Hope that helps!
blackbird audio rentals
615 279 RENT
I have a reel of old stock 2" 499 that I never used. I could use some extra christmas cash, so if anyone wants it... I'll beat whatever price you can get at retail. I just have the one reel, and I know I'll never use it.