I've never had a oil filter damaged. I just get oil and filters from my dealer. There are cheaper options, but I guess I pay for the convience.

There are a lot of alternative filters that work on our bikes, some are very good, but make sure they fit the conture of the engine and don't protude below the frame. I know of several Triumph riders who have regreted using "too long" filters.

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken