The Scavenger. So, your players retrieved the spelljammer helm from Level 23, carefully worded their wish spell to free the ship, and found someone to give it a deep clean and some TLC...and now you have a spelljammer campaign.
This is an extra (and the final) release for Level 19 and includes the repaired ship in space as well as an earlier 'derelict' version of the ship in space (with the retrieved spelljammer helm but still coated in ooze and debris).

Map Notes. I went with the same general layout for the map as it was found in the Caverns of Ooze, with the only notable difference being the room at the front of the ship (far left), is now converted into a crew lounge - as I am assuming your players aren't mind flayers and don't need storage space for severed heads in jars.
Files. I have included both Background "_BG_" and Transparent "_TP_" versions of the map (A); background means it has a flat grey image behind the dungeon and transparent means there is nothing there. For the Roll20 versions, this means the background version is a jpg while the transparent version is a png (jpegs don't support transparency); Foundry files are both dd2vtt files.
The zip files below have the Level 19 Map A both upper and lower deck levels as well as a DM overlay for the map. Roll20Free is a .jpg < 10MB, Roll20Paid is a .jpg < 20MB and Foundry formats are dd2vtt files. Roll20 maps are at 70 and 140 px per grid cell respectively and the Foundry files are 100 px (this also holds true for the transparent images).
Level 19 – Dungeon of the Mad Mage is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.