Hi,
Obviuosly the left hand drive Jimny already exists, many are sold in Europe and South America.
I don't think they will ever come to the US, not when the model is already 8 years old... It came out in 1998, so I don't see them coming to the US.
It's true they've got a lot of plastic on them, but it can be removed
.
I don't see Jimny axles being much stronger than Samurai axles...