I did some more testing...only some of the ships appear in markets. I can see Tyrants and the exploration-class ships, but I've never seen any of the Luddic Path ships or Dire Wolves.
I had the same problem so I looked into it. I don't know about the LP skins, but apparently any ships with only the 'hightech_bp' tag in ship_data.csv almost never show up for whatever reason, they aren't even visible as an option in Stelnet's market queries. In vanilla and every other mod they have something else along with hightech_bp like 'merc' or 'ind', which are the 2 most common by far.
So I edited ship_data.csv to add both merc and ind to the ships with only hightech_bp (Pinnacle, Dire Wolf, Exemplar, Seer & Clairvoyant, I think it somewhat makes sense for indies and mercs to have access to all 5) and now they actually show up in markets. I also edited the 5 derelict drones to have the 'auto_rec' tag so they can be recovered if the player has the Automated Ships skill, like other derelict drones. I'll attach my edited ship_data file, just change the file extension back to .csv (can't upload .csv files on forum, only .txt) and replace the existing ship_data.csv in the data > hulls folder. If that doesn't work its easy enough to edit tags manually, you can use Excel to modify .csv files.