Wow haven't seen you in a long time, welcome back Ral. You probably won't find anyone willing to trade erinyes for anything less than a BUR or some rare hells set loot so your best bet is to aim for a planewalker or use the yukio book you have. Planewalker can make a very powerful AA only a few points of AC under erinyes, which isn't that big of a deal since AAs spend a lot of time in the back and away from the front line.
Anyway take a look at my list, any one of my UR subraces is yours.
Hey guys, I'm back on the server and looking for a Cambion race book. I have the BURs listed here (and a bunch of other non-race burs). Will trade for any of the BURs here, but if you really need something not listed and have a Cambion for trade, drop me a line and I'll see if I have it.