Welcome to the zone.
My understanding is there used to be gear sets available for these axles, but they are hard to come by id still available at all. Unless you plan to drive it at about 45mph, you make want lower gears. You are looking at an axle swap then.
There are a few things available aftermarket: disc brake conversions from uglytruckling.com, floor pans, rocker panels and possibly lockout hubs from BJ's offroad.com, seat uphostery and tops from a few places.
There are also a few nos parts out there on ebay and military surplus stores.
If your goal is a restoration, look for a complete vehicle. If it is to mod it, some things that make have gone missing or broke may not be a big deal.
Thanks, George
Joshua 24:15