I would just say use RockAuto myself, but you can probably get better parts from other places. I could probably stand to replace all the rubber bushings myself, but suspension is hell of work to do in an apartment complex on jack-stands.
I think the major thing with accessing the upper control arm (and therefore the bushings) is you need to take tension off the torsion bars and remove the shock, after that it just becomes an issue of removing the nuts that hold the UCA. There seems to be some debate from my research whether the proper method is to jack the car up, loosen the tension on the torsion bar bolts and work on it like that, or put your front jack-stands UNDER the LCAs and let the car compress on those, therefore the entire bottom is pressurized and there is no danger to you. Off of my hair-brain, I would just go for the latter method, as it seems no different than just having the car sit on the tires naturally, and even from my memory of looking at the FSM there's NO mention of needing to loosen tension on a torsion bar to change tire or suspension parts.
