Probably a Kahler (also expensive), but OFR/similar wont fit into those, the body is too thin. Even if it does, you gotta drill through the body for inserting the claw's 2 screws, drill 2 holes for the studs, grind the tremblock.
Not...It could be done. The body isn't too thin. There are plenty of S series with Edge, LoPro, etc.
It's not very pratical. It would require too much to make it worth it with the Routing, Wizard II neck, etc., etc.
Funny you mention the Khaler. I have an original 20+ Khaler...got it when they first came out. The ZR reminds me of it, go figure.
Though, the ZR is TONS better than my old Khaler.
You need to go find a ZR trem for that body. That's your best bet. Sad but true.
Btw.. I have Edge, LoPro, and ZR equipped, S series guitars.