I have a catless 2nd gen Borla UEL header. Let me know if you're interested!
edit--
I was going to suggest $400+shipping for the Borla UEL (gen 2) based on researching past selling trends for this header on this forum, but I saw for not much more you can get a brand new Gruppe-S header on a different thread:
https://www.ft86club.com/forums/showthread.php?t=81839
That might be something to think about as well! Regardless, mine is still available if you want to make a deal.