it sounds like a great opportunity for a holidayLOL!!! A holiday with a free nervous breakdown thrown in, maybe :-)
Just booked my bitch in for progesterone test no 1 this Friday, and hopefully we will go next week--can't quite believe it will happen yet, especially since she has kept us waiting for he first time ever (2 months late...).
On ai, Star, Fit and Fertile doesn't coordinate the importation of straws (I believe), but Angelika von Heimendahl does (the Cambridge vet mentioned above). I think you will find that the cost could outweigh the expense of actually travelling with the bitch, depending on where you are going, and the outcome is unlikely to be as good as you would get with a natural mating.
One thing we did find with a bitch who came over for my boy earlier this summer was that the stress of travel and strange environment did knock her back a bit, so she was mated on days 18 and 20 (whereas previously she was 14 and 16). She whelped a litter of 6 boys and a girl 12 days ago. So I am booking a one way ticked on Eurotunnel to avoid the craziness of trying to meet a schedule or paying over the odds for a flexi-ticket...keep you fingers crossed for us!