Welcome to the forum John. The answer is most likely no. In fact if you needed to replace that collet the answer is most likely no. One of the issues with Sears routers is parts. They aren't available shortly after Sears sells the last one in that batch. That router was made by Ryobi's parent company, One World Technoligies. Sears orders a batch (after putting out a bid and that company winning it) with certain design criteria and OWT makes the batch. OWT is also putting out bids for many of the components that go into the router and when that batch is sold off and Sears is ready for a new batch many of the individual components have changed. You see the problem by now.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.