Hi, welcome to the router forums.
First off, I'm slightly confused as to which you're after. Blades for the Radial arm saw or bits for the router? Either way, bits and blades can be found through any HD, Lowes, Rocklers, Woodcraft, etc., the list can go on. There are many places that carries these.
Please fill out your profile so that we may be able to help you better.
***Please fill in your profile, at least your location. As this will help us help you better.***
"Whether active duty, retired, national guard or reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America", for an amount of "up to and including my life". That is HONOR, and there are way too many people in this country who no longer understand it." -Author Unknown