Well this is a complicating factor... But here we go: I already have (in PDF or printed book) all the material from the "new" Runequest (Role-playing in Glorantha); HQ:G's book (purchased at a second-hand store on Amazon.com); the free "Highwall Inn" scenario.
Perhaps some of these adventures from the new Runequest can be adapted without losing the HQ/QW essence, I don't know...
I also noticed that some of the out-of-print editions of HeroQuest may still be "mined" by eBay, Amazon, and Discovery Books, so I'll try to find these suggestions (and others that appear)
Thanks a lot for the help...