The only possibility I think would be to have found a film back up or transfer copy to perhaps 16mm or something. They may have made ones for smaller or foreign markets in the case of reruns.
But I severely doubt even that.
Having seen tv shows that were shot on NTSC video transferred to film for airing in South America, I can vouch that they looked terrible.
There was a scammer who advertised an alleged HS film reel on Ebay about a decade ago. Someone here unfortunately won the auction. I never did find out if they got their money back.