50 y/o Door Roller

Hello, I am needing to replace the rollers (2) for a small sliding solid teak door. This is a slider in a boat which separates the cabin from the bathroom. The door rolls/slides within a captive flat channel of gelcoated fiberglass. The door has a routed bed for the base of the roller frame which makes the roller frame flush to the bottom of the door when mounted. The door has a recessed void within the bed to accommodate the rest of the roller frame and wheel. The original wheel is plastic, 1-3/8" in diameter and 1/4" wide, when mounted it extends 3/16" below the door/bottom of the frame. The wheel is flat, no groove or pointed edge. The frame is made of some sort of cast metal which corroded over 50 years in salt water. It doesn't appear to have been particularly robust to begin with. My guess is the rollers froze up within a few years. The dimensions of the frame are 1-7/16" long, 7/16" wide. The base or foot of the frame with the screw holes is 3/15" thick. The screw holes are 2" apart. Having a replacement set and probably a few extras would be great. Brass, bronze, stainless or even plastic wheels and frames, any combination would be great. Theo