Where is the best place to purchase accessories for my soon to be M1 S90. On the list are a 2 shot extender tube, tritium sights and a tactical sling. Looking good is just as important as being good.

good luck on the 2 shot mag extension, Benelli has stop making them and will most likely not be selling mag extensions anymore(straight from Rep at shot show)  what I was told is that what ever is out there floating around is sort of grandfathered in....but what is out there is it....so the mag extensions are fetching a good amount used to be able to buy them for $70 or so....now there going for close to $200