OK, I had to google "sex bolts" to see what they were, and holy cow! This is what I have been looking for high and low, calling up fastener vendors all over the place with no luck. I had never heard of the term before. The thing that is disappointing is that with all of the specialty fastener companies all over the country that were contacted, none had ever seen what I was showing them in the pics.

So, thank you hp383 for posting this question...my fastener quest has likely been solved; quite a variety of potential sources out there.

Parts Wanted - Challenger SE Trim Screws