Why not ship wrecks that are repairable and become your own ship, of course you need a free ship license to turn them into good use. rare ship hulls a little less than pledge ships that cost 1.5 bil solars turned into QP and a little more than a normally optimized ship.
Say an Enhanced Alien Death-Ray ship that gives a little boost to ADR modules or an Alien Structure Research Ship that helps lower Alien Structure Research time or RP used maybe the only ship that can manufacture ADR??? but of course like completing ADR parts these ships can be repaired into rare Alien Ships, or maybe an alien shup with manu-bay slots higher than a factory optimized?? or has more module slots than a Titan? with am avatar graphic completely looking different than the normal earth-based ship, well of course to make it a lot different in image,
Better yet, one alien wreck in 1,000 is repairable, but doesn't need a ship license.
Or as an alternate: How about a separate set of licenses for alien ships (on par with corp ship licenses) with one ship in 100 repairable.
Or make some of the repairable alien ships have the optimizations on the pledge system such as long range jumper or wormhole cruiser.
Could also go with new ship optimizations or different sized hulls. (How about a ship with 100 manufacuturing slots or 500 module slots)