Hi Ken and welcome to the forum. The 315 in front of the model number me sans it's a Ryobi. If you can't get the parts from Sears I would suggest you take the machine to a repair shop with a good reputation and see if they have parts that will substitute for those. Otherwise it's new router time unless you find one for for parts.
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.