RE: Bishop's Finger
Go to the company's website (http://www.shepherd-neame.co.uk). They may well be able to help you. I saw their products here in Georgia some time ago, and every one of them was enjoyable when fresh (but skunked if not absolutely fresh by their insistence of using clear bottles).
The brewery is in Faversham, Kent, a hop growing area.
Good luck in your quest. I'll watch back here periodically to see of anyone can give you a better answer, or if you find one yourself and report on it here.
Really Ale-ing (Thankfully Not), Ort. Carlton in Amazing Athens, Georgia.