There are many different length propshafts with all the variations of pickups, Monteros and Sports between auto and manuals and the fancy transfer case in the SR. The service manual list the length of each combination. You might find a shaft in the ballpark of what you need at least for the rear. The front shaft shares its dimensions with most of the passenger cars as well.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.