Yeah I noticed that. However I've found TireRack's overall selection to be quite limitted. They don't carry half of what Enkei offers, no PF07, nor do they carry Konig or Neuspeed. But then they carry a dozen other brands I've never heard of...Maybe some of those brands are good too, but I don't know.
True Tire Rack doesn't sell every brand, you will need to shop different retailers depending on the wheel brand. There are definitely other Enkei dealers out there that may stock more, or that do drop shipping from Enkei.
Discount Tire Direct would be a good place for Konig, and Neuspeed is sold but a few great forum sponsors like Modded Euros, ECS Tuning and a few others.
PF07s are listed as special order only by Enkei so unless someone decided to stock them Enkei doesn't keep them in their US warehouse. That might be a tough wheel to find laying around.