You can find or build switches, on the left is the original switch on the right the replacement.
My biggest problem was finding the switches. The original switches are SPST which means Single Pull Single Throw, and the switch is either on or off. It also means the tabs are either connected or not.
A SPDT switch means Single Pull Double Throw, which come in two main types- On - On and On - Off - On. For this project finding an SPDT On - On that was a rocker and fit back in the socket was essential. The basic functionality is that in either position the opposite tab is connected with the center tab.
Reassembled switches - Left: Replacement, Top Right: Original with tab salvaged from other original. Bottom Right: Other original casing with tabs from replacement.
I really liked the action on the original switches better, and noticed that the switch case had a hole that would make it a 3 prong, which I assumed would make it SPDT. On taking one apart I found this to be the case. I used the sliver tab from the other switch to make one original switch that was now SPDT.
Simply pulling the tab and replacing it in the new switch was enough, as it was all standard to the design.
The second original casing now needed two tabs. The best option without finding a source for the manufacturer (which I'd already tried) was to canabalize one of the new switches. The tabs are slightly different and so I tried to jury-rig something together by bending the center plate.
The final product worked until it was put in place, and the insides were hardly stable, so I eventually went with one original rebuilt switch and one replacement.