It is illegal, but if you can find a seller willing to have the inspection of the cuttings done and you be willing to pay for the phyto, there is no quarantine time for cuttings received down here from CA. I will tell you that a long time ago, I had some illegal cuttings sent to me from Canada. The package got stopped at the border, the cuttings taken out of the package, and an explanation put in the package along with a slap on the hand, and it was sent on to me, complete with the tee shirt that was marked on the declaration of contents. I felt at that time that my name was probaby on a "watch" list, so we didn't try it illegally again.
Please notice, I'm talking about it being illegal to send cuttings from Canada to the US. Not the other way around. I wasn't totally clear about that when I wrote the above.
ChSam (Shirley Morr)
Chariton, Iowa
Zone 5