If there's anyone in the U.S. who wants to order some, but is scared off by shipping costs, I can add three or four to my order. We can then split the shipping based on the number you order (assuming 7, it would be ~$2.50 per set, assuming 6, it would be $3 a set) and reshipping cost should be ~$2.50 (probably a little less) for one set in a bubble mailer or small box via USPS First Class.
So, shipping cost should be $5-6 for a set and $7.50-8 for two. If you're intested, shoot me off a PM and I'll add some to my order. More established users and people with great heatware can do it on credit, but I'd prefer others to send me the money when invoicing takes place so I'm not paying for your caps out of pocket.