Cal,
Don't give up on the "field corn," way back when I was a teenager we picked field corn the first, second and even the third day is was ripe, good stuff, tasted just like sweet corn.
Surely there is someone that has fruit or nut trees in their yard where you live, in a couple of months they will be trimming them, ...just saying.
You know, I was thinkin' (dangerous, I know), how about if you went to Spain (peut-etre their customs are less strict), since it's so close, and open a boite postal and have the AMNS and dust or pellets sent there, they don't weigh much and maybe you could arrange with Todd to ship one pound per month (I received a 200 g package from England and it was about 6 Euros, so EU to Spain can't be much more if any) he sent an AMNS to me with dust and I don't remember the shipping, but I don't think it was that much, you might PM Todd, he could tell you for sure what the shipping would be.
Maybe that helps,
Gene