Your best chance for help is to contact Waste-King directly: http://www.waste-king.com/
I'll add that YOUR disposer is a domestic one which is relatively cheap to purchase outright. With that in mind, there's probably NO market to repair it and very likely no parts available for doing so, since repair costs can EASILY surpass the price of a new one. This is the case for MANY household appliances, except for some of the big stuff.
Those of us HERE - do occasionally repair disposers, but only the BIG ones typically found in restaurants. Given their initial purchase cost at WELL over $1000, repair versus replacement might be justifiable.
That little Waste King you got there? Nope. Never took one apart to repair it...and never will.
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