'Low trs 2' trem replacement

I'm looking to swap out my low trs 2 trem on an ibanez I aquired and have NO clue which replacments wont require expensive routing and hassle...

I was looking at original floyd rose pro's,schaller floyds,lo-pro edges,edge pro's,but still not sure if they are accomodated.

Anyone experience swapping a low end rg trem(most likley a low trs 1 or 2)?Its a great neck-thru RG that if upgraded,could seriously wreck most US made RG's.You guys know the one...its the eh...the rgt42 I think?

Anyway yeah,if you know what would be a fitting replacment it would be much appreciated.

Ibanez Edge or Lo-pro Edge won't fit without rerouting. Not sure of the new Edge pro since they seem to put it in every other guitar nowadays. It just might go there. IIRC
I read somewhere that the Schaller FRII would fit but can't tell for sure. FR original or FRIII won't fit...