i can build you some very nice custom xo's The parts are kinda spendy but not bad and well worth it. I use solen polyproplene Cap's on everything that needs caps. and low insertion air core ribbon wound inductiors. I can use any alignment you prefer. But i would suggest 6 or 12 db. and maby 18db depending on the tweet.
All i need is make and model of each speaker. to build. I can cet the parameters of speaker online. I already have parameters for about 100 diffrent speaker lines.