Conatact Kimberley Jebson, Secretary of the ACD Society of GB at austmans@supanet.com. She should be able to advise you of any litters. The breeder I got Obi from recently had a litter in Anglesey but I would guess they are all spoken for
Please make sure any pup you get has been hearing tested and comes from eye tested, hip scored and preferably elbow scored parents (though this is not often done at present)
Hayley