If you're flying a T9, you can afford to buy a fast, longrange ship like an Asp to use for scouting.
In your galaxy map, set the View filters to show _only_ high tech systems that have a large population (put that MIN slider up to about the 70% mark). Then scout every green dot you see. Eventually you'll find a station that has what you need.
Note: do this in an area where you have Friendly, or even better Allied, reputation with the major faction (Federation, Empire, etc.) You see more options for sale in the outfitting screens with a higher reputation.