Gazza2: Given the state of the dollar against the pound, I'd say your best bet is to order directly from the States. Folk CDs generally go for around $15 here (about GBP 7.50, and airmail for one CD shouldn't be much more than $5.

Bob's CDs are available HERE, and they take credit cards.

You could also contact him directly and see if he will take PayPal - he may well not, as I don't see any indication that he does on his webpage - but it is the easiest way to transfer small amounts of money internationally.