I got my seeds from Sampleseeds.com. Actually, I buy most of my tomato seeds from her. Remy sells small amounts (~15) seeds for a small price (~1.50), and her packets are very often overfilled. She's got a great website, and awesome customer service. Have always had great germination from her seeds. She also has seeds other than tomatoes--herbs, beans, flowers, squash, etc.
Please note that there are other tomato varieties called "Golden Queen". The "Golden Queen USDA" is a distinct variety.
Remy normally lists all of her new seeds in November, and some varieties sell out quickly. She also is one of the select vendors for some of the new varieties from the Dwarf Tomato Project.