Be creative. Vasudans have a slightly similar style to CSA (curvy, sleek ships). You can find some that are both tilemapped and hi-poly. Aestival is released, with a nice green texture (or you could ask Spoon for a bunch of tileable, CSA style maps). Then, just reskin the Zods to look like CSA. TBH, when you take a closer look at those ships, their turret models are nothing unusual. They do have a certain distinctive style to them, but if you use them, people will just go "hey, WoD ships" instead of associating them with your mod. You have to use some models that aren't so strongly associated with one campaign (Stratcomm's Vasudans are a good idea), and give a distinctive, personalized touch to them. If you're good with PCS2, you can also move turrets around and replace them if you need to (adding shields is also easy, if that's what you want from WoD ships).