I need a headlight switch for my 1956 Ford Fairlane and I'm debating whether to buy a NOS switch off eBay, or go with an after-market switch from one of the suppliers?  I went through this recently with an ignition switch, initially buying a "new" switch from an after-market source.  It turned out that the threaded posts on the back for BAT, ACC and IGN were much shorter than my original equipment switch, so much so that I couldn't stack all my connections on the posts.  I bought it from a great supplier who immediately returned my money, then I bought an NOS unit off eBay and it worked out fine.  Anyway, just wondering if there's a down side to buying NOS electrical items like these switches.  Thanks, Ron