No i haven't as a matter of fact-by accounts one can get hold of it in the U.K. if you know the right people-i have no contacts regarding this however,Matthew delooze knows his Ayahuasca-on his site he's posted lots of articles concerning his experiences using this in the Amazon and in the U.K.
http://www.matthewdelooze.co.uk/viewpage.php?page_id=9