My dad had a KE38 CS Wagon he brought brand new and kept until the rust was too much and the wreckers gave him $50 for it!
I know you don't really want '80's but I have a KE70 CS with 4AGE that I am only after $3000 for. Let me know if you are interested.
If not, good luck with your search.
The KE30-55 wagons loved to rust around the rear quarter windows (back corner), tailgate glass, rear guards and near the taigate aperature rubber. The fornt didn't seem to get anywhere near as bad for some reason....