Windshield rubber you can get at a auto glass installer, SOR, and i think you can still get OEM from Toyota. I have used the aftermarket w/s rubber from SOR and it works fine. If side door means the doors you can get that from SOR also. You just need to cut the top part off and glue it to the door jam/door bow on the roof panel.
You probably have bug catcher vent windows on your doors, weather stripping for those don't exist, but there is a thread in the 45 section where some are possibly going to be reproduced. I think the thread is called, Yet another Vent window question. If your side windows pivot in the center of the window frame you have later style vent windows, you can get w/s for those on Ebay, and SOR and some other Toyota Land Cruiser venders.