Yay! I ordered all the parts I needed for the Infiniti. I was able to get all the parts I need from RockAuto for just under $120, with shipping. Not bad. Just a muffler, inner tie rod end, CV boot, and control arm bushing. The muffler was the most expensive thing. Everything else we thought we'd need replaced, we should be able to work with or find other options.
Also, the sound my Durango was making has been figured out. It needed rear diff fluid! Simple, but unusual. Should be good to go now!