I had found a website that had new hardware for the UCA's, including the flag head bolts, it was just as easy to cut them away as it was to fight the rust, etc. A good shot of PBlast a couple days ahead of time should ease the pain. As far as the lowers, replacement control arms with new bushings already pressed in are available, I think a set from Crown runs about $75 for the pair if you shop around.
On the uppers I tried the home-made press with all thread, they didn't budge, then tried the harbor freight press, it was awkward at best, then I drilled the rubber part out and took a BFH to the sleeve, out they came. Just my experience with it, this vehicle seemed to have spent some time in the northeast so the corrosion may have been on the bad side.
Mark