"EXGF" doesn't really strike me as a softcore niche...
If you don't mind my asking, are you specifically looking for softcore content to promote the niche?
We have fantastic amateur and exgf and have been 2257 compliant since even before that was made a statute. We can soft content tours and galleries but our sites are hardcore once you get inside. So, not sure if that works for what you are looking for...