Hi Frank, Samlesbury really is a cool place, really tranquil, Whitepine, when we lived in merseyside we used to do the bonsai run up the A56 (liverpool to preston road) stopping at Ken Shalikers
www.pinewoodbonsai.com then moving up to salmesbury bonsai and finally stopping at John barnes windycote bonsai near blackpool before returning on the motorway. From your neck of the woods you could start from the opposite end, lots of general garden nurseries along the way too, including a couple dealing in wholesale landscape trees, regards Andrew