I have a soft spot for these figures as well. Great paint jobs. Some one is recasting these models, although I forget the sites address.
I saw a site with the official molds making new casts, but these were 100% ancient lead. Luckily there was no lead rot or anything like that, but it was clear the molds had been used quite a bit as the casts have some artifacts that needed cleaning. Most were good though, and some of them were really good.
I'm glad so many folks liked seeing these. I never had too many Heritage figures, only the Orcus figure and an orc or two, all painted in enamels back in 1980, and did not realize how big a line it was. I only grew up with Grenadier.