I've tried to reach Jon Pintar by email, contact form, and Reddit tag.

To be clear, I'm not looking for someone to violate Jon's copyright. His maps are colorizations of the original TSR module maps. I need maps for two new levels -- a lab level and an engine(ering) level -- that aren't in the published adventure. I'd like all the maps, old and new, to have a similar look and feel, so they work together from the players' perspective.

Oh, and I neglected to mention they're for uploading onto Roll20.