>>9684680It is indeed a different mold! Even the rare Dark Forest Fortress baseplate has the raised mound on the far corner.
If you are patient, you can find many of the more common raised baseplates for about $15-30. Some of the rarer ones like the pirate ramps will be more like $40-50, but I still don't think that's too bad considering they're 20+ years old and that would only buy you a pittance of a set at MSRP.
