KLR don't do it; to my knowledge nobody does. I know KLR have had thoughts of putting a baby Allison behind a 4BD1, but the cost would be astronomical simply due to how much Allisons cost.
There has been at least one auto conversion on Aulro - in a Rangie I think, with a ZF box - however it was unsuccessful (read: it died repeatedly) and the vehicle was returned to manual in short order.
I have to admit, it just doesn't seem right for a Perentie.