I don't know about the shipping. But a few points here.
1 NOTHING kills mite eggs. Not even PAM.
2 Three weeks? That's way too long. If you can't get what you want, you have to use something else. There have been several threads here listing alternatives. Here are a couple.
http://www.ball-pythons.net/forums/s...ad.php?t=32888
http://www.ball-pythons.net/forums/s...ad.php?t=93197