...and one time I ever used polar coordinate graph paper to do a faux non-euclidean dungeon level, but it never, ever considered mapping in irregular pentagons:
Holocaustic Dungeons is a dubiously-named sci-fi/fantasy game/module series from Silverwolf Games. Why you would need to map these dungeons onto rows of half-hexagons is not clear to me. You can also get hex paper from the same company, which only raises more questions. Although published in the 1980's, you can still buy Silverwolf Games materials new, if this website that looks like it was built in 1995 can be believed.