Just about every novel from the 19th century was made into a miniseries by the BBC or ITV at some point! I get them all from my local library, but I usually find them by browsing the British TV section at Borders first; they've got a great selection of DVDS of old and/or obscure shows I didn't know existed, and I've discovered some real gems on their shelves! Another good way to find newer minis is to look through the Masterpiece Theatre archive at PBS.org.

Northanger Abbey is actually my second favorite Jane Austen book, and Masterpiece Theatre just did a very good adaptation of it during their Jane Austen season last year; you might want to check it out if you haven't seen it, since it's very cute and it could give you a different view of the book, but if not, it's still good fun in it's own right. And JJ Field plays Henry Tilney! :)