I believe that Brownell's and Midwest Gun Works will have everything you need. I have had a number of link failures, a locking lug failure (these are available in oversize versions as a wear compensation), a barrel extension failure, O-rings not so often, barrel support, shell lifter extension on release models, extractor breaks, firing pin springs broken causing misfires...I won't go on but these are over many thousands of rounds in three different 1100's. Just get a selection of parts and carry them, most people can change these parts themselves. Really a pretty good gun.
Have fun,
Larry
Have fun,
Larry
