Just a cursory search for "Rhode Gear" and "Flickstand" will give you plenty of results- nation wide.

As far as a Flickstand goes- they're easy to put on and remove- IIRC, 2 screws- same as if one were to put on Cannondale mounting hooks- and using a Cannondale bag as an identification point. Additionally, the plastic can become brittle and break over the course of 35+ years.

I guess I'm more or less just saying that the odds are against it- as much as you'd want to believe it- and as much ordinary evidence points at provenance- and even if the odds were in favor of- that bike is beat to **** and they want $300 for it. And you have to get it to FL.

On the other hand, my brother in law sold his 1969 Firebird in like 2015- around 5 years ago he went on a mission to find his car- he didn't remember who bought it, he had the VIN but it had not been re-registered. Through a series of completely unlikely events- he found his old car. The guy that bought it had plans to completely mod it- and had put it in storage, bought some parts and never touched it. When my brother in law found it, it still had HIS garbage in the trunk and console- and he was able to buy it back.