You should be able to buy a used one from a cycle scrapyard. it was a fairly common model. Otherwise you would have to compare the contact layout and wiring, as shown in the service manual for your model, with the same for the model of switch you are trying to use in its place--major pain in the a**! Have you tried looking for a switch from a CB200T or a TwinStar 185? They are very likely to be the same.
