Doesn't EDDB offer the ability to find specific ships for sale at specific systems within a range of your current location?
I've been Elite for so long now I can't remember for sure and of course I now get all my stuff at Founders World/Sinrarta Dezra, but I distinctly remember being able to search for specific ships using EDDB and it would return results of where that ship was for sale based on distance from my present location. Same goes for modules.
Is this no longer a thing?
Is the OP unaware of the power of third party tools for this game? Obviously it would be preferable if you could do all this in-game, but if you are serious about finding something with the least amount of effort, it is kind of mandatory at this point in time to turn to something like EDDB and other third party tools.
OP wants all the info available in game.
Not sure how he wants to access it, the interface is clunky enough as it is, adding a 'closest location for ships not available here' tab in the shipyard maybe?