We have a '78 201J.  A few of the rocker switches, pitot heat, nav lites, strobes, etc.  are very worn and don't seem to have very good action.  I would like to replace these.  Does anyone know of a good source for these switches.  I found some at Chief Aircraft http://www.chiefaircraft.com/airsec/Aircraft/InstallationSupply/RockerSwitches.html .  Would these be a reasonable replacement?  Is it true these switches are some sort of circuit breaker, too?  Thanks for any info you can provide.