I think that 95% of your parts are interchangeable, just steering linkage etc, but not exactly sure. They are more rare here in the states, but all over Aussie where I am sure you can find hard to get parts...for a price. I have two DJ5 "mail carrier" jeeps that are RHD, and its kind of a kick being on the wrong side of the vehicle. My first FJ40 was a 67', loved it, really like the round blinkers and even the 3 on the tree. I like your tag "Muchbroker", it will get worse owning an FJ40
Good Luck, POST PICS!!
I have an '82 RHD and have zero problems getting parts. For the few things that aren't interchangable (steering gear, in particular) you might have to order from overseas, but the Aussie vendors like Roodogs are happy to deal with the US.
I suspect a '67 will be a bit more difficult, however... but still not impossible.