I saw the three pack of Viper towels at monument car parts in san ramon california for $16.95 that's a few more dollars than the online price but they do also carry 303 aerospace protectant for $9.95 / 16oz and $15.99 / 32oz.
it's the same package as this one:
http://www.properautocare.com/vipmicdetclo.html
it's the same package as this one:
http://www.properautocare.com/vipmicdetclo.html