if your shipvendor doesnt update his vendorlist
issue this consule command.
open terminal, select the vendor NPC
type spawndupe
this will add second merchant he will have the correct list

This mod let you buy ANY ship spreaded over 3 ShipYards
All Ships (300+) Available for Purchase at Shipyard.
New Atlantis 128 ships may vary with your level
Cydonia 64 Ships may vary with your level
Neon 128 ships may vary with your level
Work perfectly on a new playthrough, if you want use this on existing playthrough read top of this description