The butterscotch colored plastic parts and the cap are nearly impossible to find, if found they will be costly. I have seen points that fit the unit they come in a box from "Sierra Supply Company"
Jere Jobe at Vintage Carburetion Technologies rebuilds and restores these units. He used Bendix aircraft points in it. And he recommends running Standard UC-15's condensers for 12V. They have the resistor built in.