While not a perfect "Drop In" replacement, this Gotoh GE1996T, it has a very close radius to the Ibanez's 15" neck, coming in at 13.75. So a little shimming could get your action even lower. It also isn't limited to your post spacing, with a flat edge on the lower string section of the bridge plate. Smooth movement, solid locking, and a nice flutter!!!

I will be on vacation when this airs, so apologies upfront for not getting right back to comments. I will not have cell reception, but at least this Ibby has been tended to. See you soon!