On PGT there was a map as popular back then as python is today called "the artist". It is similar to Luna but is not playable today because of the difficulty of fast expanding.
I admire your mapmaking skill and ask if you would like to reinvent the past? All is needed, imo, is just to fix the first expansions.
It's not exactly the same layout, but Escher Plane by Freakling is pretty similar. In fact I think it's overall a more interesting map - there's some high ground in the center, you can glitch workers onto the islands from the main land-mass, and the aesthetics are about 2000% better. modified by NegativeZero