Go with the Toyota axles, they are pretty much the perfect size for the sami.
If you wanted they indestructible, you could look for a 84 to 85 front axle.
Get a knuckle ball kit, truss, and longfields. That would be a pretty stout front axle and handle what ever you could throw at it + the 35"s.
Plus you would have a 4.10 gears, with a 6.5:1 T-case gearing you could turn a 35.
The rear Axel is a whole different story, they have to be off-set, due to the fact that a samurai has an off-set rear axle and the Toyota has a centered axle. Sky manufacturing can off set the axles for you.
Amilla