This seems a good price on the seats and cage. If I were closer I’d be checking these out.
https://phoenix.craigslist.org/wvl/pts/d/wickenburg-jeep-willys-cj3b-full-roll/7622826368.html
“Full family style roll cage with 3 race buckets with covers. May trade for ammunition or firearms. No reloads! Don’t contact me on ad if you are not willing to drive to Wickenburg. Seat mounts are tied into cage.”