I went on the FJ Cruiser and T4R forums and they use the same lower control arms in the front as the GX470.
Regardless if you are re-building or replacing, there's a potential that the bolts/hardware is seized/rusted. I'm hoping that a So Cal rig doesn't have this problem at all, but we'll see. The hardware should be Toyota OEM.
If you rebuild, the Toyota OEM bushings are expensive. Just the 4 bushings for the LCAs are like $160 or something like that on ebay. This doesn't include the ball joints which should be replaced as well. There's other options for cheaper bushings and ball joints, but OEM is spendy.
If you replace, there are various degrees of prices on the new LCAs. It's just the quality is unknown on some of the lowered priced units. People on the aforementioned boards claim the really inexpensive ones from 1AAuto are okay and one guy has had them for 15k miles.
Quick summary on prices (not extensive research -- updated prices on 3/12/2018 from what others have commented):
1. $140/pair, TRQ LCAs, from 1A-Auto at Amazon (no tax, free shipping with prime)
2. $200/pair, MAC Auto
3. $270/pair, Mevotech
4. $330/pair, Moog
6. $528/pair, Toyota OEM, online stores
7. $1800/pair, Total Chaos
I'm still not sure which path to take, but I'm getting a better idea on what needs to be done on each path.