I have located and mirrored all of the lost The Witcher 1 mods from CDPR's website to moddb.
I am confident in my assumption that all of The Witcher 1's custom adventures are now on Moddb. CDPR's website listed a few more but they were all included with the official 1.5 update. They are still in the latest release of the game on GOG/Steam. The only other mods I can find evidence of existing for TW1 were minor texture replacement mods or minor code mods to the base game.
I've also updated my Extra Tools archive for TW1 to include several lost utilities. I recommend checking it out.
Unfortunately TW2 has some lost mods that I doubt we'll find anytime soon. Such as The Witcher 2: Island of Convicts and Roses of Shaerrawedd. These were both uploaded to CDPR's website and were taken down when they redesigned their website and removed references to Redkit. Fortunately these mods weren't finished and were just short proof of concept demos. But regardless it would be nice to archive them. If anyone has any leads on finding them let me know.
