Redzone,
I have ordered accessories from Long Island Shooting Center. Their attitude is not the best (typical NY attitude- apologies to NY TFL'ers), but they know their Benellis and have the stuff in stock, which was important to me.
I will be ordering the recoil reducer from them shortly. Got the mag extension- it's not really a 2 rd. extension- the gun goes to 7+1 with the extension, so it's really a 3 rd. extension if you're using 2.75" shells.