Fix the original. It may be true that the 60-62 is the easiest to fix. Some parts are under the horn button but the switch is down the column and is operated by a cable. As said, everything is available and the assembly is fairly simple after you study the mechanism and manual.
Determine why it does not work. We will help you trouble shoot and advise where to get parts.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn