Well one, Volumetric Explosions took a lot of stuff from Bailknights already, so that's probably redundant to have the two together. Second, mods typically need to be update for each patch, let alone an expansion, I to my knowledge Volumetric Explosions hasn't been updated for a while.
Best place to find mods are is just to browse this forum and see what's for Rebellion, the Rebellion moddb page, or lists like this one.
