I ordered from Oregon Trail Garlic last year and the two varieties Bavarian Purple and German Red did very well for the first time I have grown garlic. I saved a bunch of good sized heads to plant next year. After reading up on other garlic varieties, I wanted to try Spanish Roja for next year and since Oregon Trail didn't have it, I ordered from Filaree Garlic Farm. Both of these companies were recommended as seed sources in the garlic book I read. I still have the book around if you would like some other sources that were listed.
George
http://www.oregontrailgarlic.com
http://www.filareefarm.com