This is the end of my first year as a homebrewer so I wasn't around for the hop shortages of the last couple of years. A few of the recipes I've worked on so far have called for Challenger hops or other types that my LHBS doesn't carry any more. I also haven't had any luck finding a source for Challenger hop rhizomes.
Is there something special about Challenger, like the patent issues with Simcoe, or is there some other reason why they're nigh-upon unobtainable these days?
Challenger is an older English hop. I don't think it's grown commercially in the US, at least it isn't listed in the NASS report for 2008.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk
I believe there are special permits that need to be granted for shipping root stock from overseas. And I believe California is especially picky about that. But don't worry, Obama wouldn't ship you to Gitmo...Arnold would send you to Alcatraz first.
Seriously, one of my partners knows all about these regulations. I'll find you an answer.