My insurance doesn't cover my test either. So I use a coupon that you can get from www.goodrx.com
It will ask you for the medication you're looking for and then it tells you the cheapest place to get it with a coupon you can print out.
If i remember correctly on my seizure letter it stated that you must have written permission from the DEA to bring it in because it's a controlled substance. But I've also heard that you can bring in a 3 month supply on your person with a prescription. So it sounds like mail order is a no, but possibly if you declare it and personally bring it back?