I've been searching for months for a turn signal switch for my 67 without a T&T column. I've already bought one from USA Parts Supply that only lasted a few months before it malfunctioned electrically. I have no problems buying another from those guys but they are currently on back order. I've had a wiper washer repair kit on back order with them for over a year and can't wait that long. I can find a few sites selling a cancelling cam but that's not my issue.
I've also tried Caddy Daddy, AC Delco, Collectors Auto Supply and OPGI...all out of stock.