This is a tool I came up with to press in the dust seal, retainer ring, and piston. It consists of a 3/8-16 x 2.5" socket cap bolt, 2 2" fender washers, 2 nuts, and enough 3/8" washers to clear the shank of the bolt and one between the fender washer and nut so it all goes smoothly.
Note: My RRC has vented discs, thus the 2.5" bolt. If you have solid discs, you only need a 2" bolt.
