According to a web post, http://urantiapharma.com was shut down in April due to "technical problems". There's an alternate site recommended on the same page but based on the linked site, I wouldn't deal with them.

This drug is available off-patent in several foreign. You can Google it, but "let the buyer beware" is advised. The original patent holder is doing its best to surpress generic alternatives and at least one Indian manufacturer was recently shut down, apparently for process inconsistencies. I guess you know the original Plavix has "black box" warnings in the USA as of March this year. If you've been taking it for a year, you are probably not one with a genetic makeup that would be affected by the warning.

For price comparison, Costco pharmacy sells Plavix for $579 per 100. At $6 a pill, there's a lot of incentive for counterfeiters.