The original edge will work fine. All you need to do is remove the shims under your middle saddles to reuse on the replacement. So even if you can find a good price on a used one in great condition, it can be from any Ibanez model, just make sure you keep your old shims.
And if it doesn't have shim then it has a different base plate meant for a 9" radius board. you can always buy some Floyd rose saddle shim and shim the new(ish) bridge you get.
My js24p has shim under the saddles. so saddle shim will work just fine.