Which one do u have? And I am willing to overpay based on PoxBox rates. Let me know how much credit worth of runes you require for it.
I don't think poxbox has anything of comparable value, unfortunately. I have 2x all giving trees except IS, of which I have none, and I have a 3rd in FS and FW. Unless I could get another really rare limited like vampire bat or haunting spirit or something, which would be fairly silly on your part, I don't think we'll be able to work anything out.