US people might try True North Seeds in Canada. As far as I know, mail between Canada and US is less likely to be checked than from overseas, at least small stuff. They have a free trade agreement which may be why, and also a very high volume of trade. I doubt they have the manpower to check much of it. I would choose untracked shipping because I've read about what the Customs guys look for to flag mail for checking and tracking is one of the things. They specifically target tracked mail because they know there must be something valuable in there I guess. True North have a good selection and guaranteed delivery insurance. They accept CC.