Several years ago, there was a Craigslist ad in Kentucky that offered the mold for the Batman ride figure for sale. I believe he was asking something like $350 for it at the time, as I recall. Perhaps he also owned the mold for the GH figure?
Not every TV series would get the kiddie-car treatment, and it seems to be undeniable that the wealth of licensed GH merchandise produced saturated in so many categories just in 1966 is an indicator of how Dozier intended the series to be a major hit. I cannot be certain, but it appeared the GH TV series had more direct merchandising with clear TV character imagery than Batman, which had a ton of 1966/67 merchandise selling the comic branding more than the TV series.