In 2023 after 7 yrs of searching, I found a boxed version of the *original* US-made "Dune II: Building of a Dynasty" in NTSC format.
I outline all of the (small) changes between the NTSC/PAL versions here:
https://www.amigalove.com/viewtopic.php?t=2658
Spoilers:
The only in-game difference PAL folks will notice are:
- The title screen (before it was changed to "Battle for Arrakis")
- The potential to read "color" vs "colour" (maybe) ;)
PAL reused ALL of the NTSC art verbatim.
**I made ADFs from my disks**