I would personally go with MeyleHD. Very happy with those parts after 2 failures in a row with aftermarket and "oem" replacements (but that was my thrust arm and swaybar end links). Lemforder seems to be the only other real, durable OEM option.

I dont think you are saving that much money by doing just the bushing. I would get the entire arm. Complete replacement is quite simple. Just make sure you do the final tightening once wheels are loaded. I also dont think you need an alignment, so long as you dont touch anything else.