Thank you very much for your help. I have bought parts from cruiser outfitter before.We are glad to help with your questions and you should feel free to ask whatever you want. That said, I offer the following in an effort to encourage a little more self sufficiency before such a big trip.
I'm surprised that you are taking off on such an adventure yet aren't able to identify the axle in your vehicle or source the brake parts for it once it's been identified for you. Upping your skills in these areas will make for a smoother trip I'm sure, particularly when there's no internet service or similar support network. Having print manuals, etc. may help but there's a ton of value to being familiar with your rig and what it takes to keep it rolling, even if it's just to help you avoid getting screwed by a bush mech.
One technique that can allow you to learn a lot of related information on any subject and also self-serve in terms of finding information about Toyota 4wd vehicles is to search this site using Google. For instance you can drop the following into the Google search engine to get a lot of info related to rear brake pads on fzj80s:
rear brake pads fzj80 ih8mud.comYou can change the part name or the model name as needed and as you learn new/better terms to search for.
There are a number of parts suppliers that can ship to international locations and you should plan ahead for which ones to use and what will be required to get parts to different points on your route, in my opinion. Here's a search on that topic that more specifically limits results to this site only:
landcruiser parts suppliers site:forum.ih8mud.comOne supplier that I've used that offers good support and can answer questions, should you need help is Cruiser Outfitters. They list some brake pad options on this page:
Another parts supplier that I've used which has good prices and I suspect will be pretty competent at international shipping is Partsouq since they are in the middle east yet many here in the states use them:
We present to your attention our wide range of quality auto parts for many brands of cars. Our genuine parts catalogs and search by part number will help you!partsouq.comYou may be planning this already but I'd recommend keeping spare brake pads on board for such a trip, particularly front pads. No telling how your front/rear bias is setup on that rig so it's hard to guess on pad wear but it's not uncommon to wear the front pads much faster than the rears.