Product review (3 stars): Good source for this hard to find item
Waste King is not the most popular sink disposal, although Costco and Amazon both carry the disposals.  There does not appear to be a local source for the worn parts, which really translates into the splash guard (and stopper), as the internals do not appear to be all that replaceable.  Since Amazon carries this part at reasonable cost, it is easy enough to order from them.  The part itself is easy to replace, although it does not feel all that sturdy, leading me to expect replacement on a regular basis.  The splash guard is easily deformed due the thin construction.  Planned obsolescence it appears to be.  Thus, only three stars.  After several months of use the thin construction is deformed and in need of replacement, so I will be ordering again soon and my original reviews stands.  I do recommend Waste King disposals, but just order these every six months and be covered.