From what I understand, 1F engine parts are hard to come by for a rebuild. I would suggest searching craigslist, IH8MUD, etc. to find a good running 1F as a replacement. Or consider a 2F swap. 2Fs from FJ60s are pretty plentiful right now.
What are your symptoms that make you think it threw a rod?
Rising Sun Bio
2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering,
no more Sanden OBA
1FZ-FE factory lockers +
Safari intercooled turbo, CDL switch, cup holder, Metric TLC leather, heated seats, JDM switches, PUMA OBA.
Warn M12000 waiting for a bumper.
Limited TRD 2UZ-FE SOLD