Right here on the forum - PM badboybeeson, he'll hook you up. He's got the coolest stock adapters and rails that turn your shotgun into a door-breaching, slug throwing, easily-mangagable-recoiling killing machine.
Take a look at some of the topics four or five down - wherever there's pictures, you'll see really cool gear that you should probably buy because it'll improve your love life.*
*Lovelife may not actually improve upon the purchase of new shotgun parts - your lovelife is contingent entirely on your ### drive, and since the parts are pretty hot, I suppose, maybe, you might be a bit more easily excitable. Actual results may vary. See contest rules for details.