Spectrum brand is good. I got mine from Gastanks.com and it was good also. Don't forget a new sender, straps, line kit and clips. My fuel system overhaul was one of the best money I've spent on my car. tmm http://www.gastanks.com/
i swear by spectra premium. i have used american designers and spectra premium..
personally I would use the spectra premium tank. as for where to buy. check your local parts house.. i think they should have them..