The Temple of Elemental Evil was first made for AD&D, meaning that characters and monsters were still built for that system. It is still ranked as one of the best campaigns in the system. Was it or its character lists ever updated to 3.5 or even 3E rules? I have found the "Return to the Temple of Elemental Evil" campaign, and it seems to indicate that it is meant to directly follow the previous campaign, albeit fifteen years later.
I am looking for anything official or any outside efforts on this. (Homemade documents, third-person PDFs, etc.)