There are a few supplier that sells what you are looking for. Personally, if you are not racing it, its too much adjustability for nothing. Install good urethane bushings. thick sway bars and good springs. ArizonaZ, Techno Toy Tuning, Californiadatsun.com are some that comes to mind. You can also upgrade the rear drums to disks, it a common upgrade since drums and the accessories are getting scarce. The eccentric bushings are also good, not expensive, but are hard to adjust when needed, from what I hear. Basically it boils down to money, if you like bling, and what is the intent; street driving or track.
Hope that answers your questions.