You could use
LFS-TV for this
. LFS-TV is a program that can be used to download and watch mpr files in real time. Your multiplayer replays are saved as mpr files.
Basically you would need to install LFS on the three computers (one license is enough) and also install LFS-TV for these three computers. These three computers need to be connected, or in other words, the other 2 computers need to be connected with the driving computer. Basically you set the "driving" computer to transmit the mpr files and the other 2 are recieving. Basically this works offline as well, but to record mpr files you need to be multiplayer mode in LFS. The other 2 computer do not need access to internet so they do not use you bandwidth. The other 2 computers' displays are set up so that they show the sideviews or whatever you want them to show and the middle screen is showing the driving view. With this the other two computers have a slight delay in time but you can set them up just the way you want, with.
Obviously the negative sides of doing this would be the costs of having three separate computers to operate. Without any scripting and programming you would need to manually select the mpr files for each computers inside LFS. Not very practical solution but by doing it this way you could have all the positive sides of using three monitors. Separate viewpoints (=no distortion on edges), separate antialiasing settings, fovs etc.. And have 3 computers
Using 3x TH2G for 3 monitors 600€
Buying 9 monitors and three computers 6500€
Using LFS-TV and having 9 displays for LFSsing at the same time. Priceless!