I got everything I needed from cruiser outfitters to make the swap to manual hubs. They made it easy to get the parts.I also have an HZJ77 and have seen that many people switch to locking hubs. Do you have a Part Number for the hubs? I assume y'all usually use an earlier model's Asin hubs, correct? Also, where do y'all source them from? Cruiser Outfitters? Toyota Directly?
Make sure you get the the knuckles too without the groove for the electric wires or you will have a hole that water can get into If you try to reuse the original knuckles.