Best source for turn signal switch

On my 68 Dart, my signals work fine and cancel, but to not snap in place and sometimes activates the left lights without the inside light on, from gravity. Can that piece be bought separate? I also see complete switch's from $50. to $200. Getting OEM would be great, but who makes a good aftermarket unit? Thanks!
Turn signal cams are about $10 from Classic Industries. They have switches too. Kind of tough, you might have to take it apart to see what is wrong before ordering parts.