OP, in case you don't know: Specialized has a 30-day return policy, even if you have used something like a saddle. So, if the Romin doesn't work for you, it needn't be money wasted.
pipeliner recommended the Selle Anatomica...I haven't used one, but my brother swears by his. Beyond that, I've got no advice as my sitbones are about 127mm.