There is a new 20th edition version released on drivethrurpg that includes virtual tabletop maps, as well as creatures, player handouts, etc. I'm certain you could build the module out here on roll20. Alternatively, it might be worthwhile to message the developers of the module about selling it on Roll20, as The Aaron suggested. I know that the exclusivity guidelines aren't as strict as the DM's Guild, so they might be willing to do that if there was enough interest.