Interesting thread
How I matched the Rygar maps when working with Sandruzzo. I used "Tiled" software (Mac,PC) and setup a extra Reference layer from the arcade maps, and in general modify the transparency as well as toggle on/off to see any tile changes.
The 27 Rounds of Tiled maps have been created here. These are most likely unusable as they use all the tiles in one file.
https://drive.google.com/open?id=1TL...xvXr8inM2xJ6-3
If you can lock down final tile arrangement and colourset you want and export an iff/png, I'd be happy to recreate the maps. This time though I won't make them all, instead as you require a new map/Round as they do indeed take a long time. If you have someone else creating the maps, great also
Good luck