Just updating some info NDGSX posted here last Fall...
He found a real rear camber kit for 1G DSMs - it replaces the original control arm bushings with eccentric bushings (no cheesy shimming of the rear mounts, or having to replace the whole control arm!), but unfortunately, Mofugas does not carry it anymore.
You can get this kit - Part #KCA 365 (for Gallant VR4) for around $50 delivered from Whiteline.com.au (Australia).
Enjoy!

Has anyone used this kit? And how hard is the install?

Paraphrasing NDGSX...
Install isn't that bad. Unbolt the upper control arm and use a pickle fork or preferably a small gear puller (napa and other parts stores should rent one to you). Burn out the stock bushing with a propane torch (careful the gas is nasty). Clean out the metal sleeve in the arm with a wire brush and sand paper. Grease the new bushings, and put the eccentric sleeve through the bushings with the hole positioned so that it makes the arm longer. You now have 3 degrees less camber and another 3 degrees of stock adjustment.

I've put them on three cars, exactly like I describe it in the quote. They work great. Once the bolt is torqued down they can not rotate either, it is a permenant solution.

You may notice the bushings want to pop out, I put the arm in a bench vice to keep them compressed, then clean out the subframe (where the bushing touches), apply the grease to the subframe, then put the arms in as quickly as I can after removing them from the vice.

i just found this site that has it for 80, but they are all out.
http://www.taboospeedshop.com/

That's a different camber kit. These are bushings that go on the inside of the arm and have an eccentric metal sleeve through them.

I used upper rear tubular control arms (fully adjustable) from Engall's Engineering in Colorado, to correct my rear camber problems. I like them. If you use these you may NOT want to reuse the original upper ball joint. If so ask the parts man for a front lower ball joint as they are the same joint and the original is serviced as a complete arm only.
(that info cost me to get , too, tho I pass it on for free.) One warning.... if you run over a huge pothole, or a parking lot barrier or the like, these babys can be a little lightly constructed for off road rally cross but for normal operation I find them a real headache solver. For what it is worth.

australian site's search bot cant find that part number..

Dont use a space between KCA and 365 and it comes up. SEARCH KCA365. Thanks for the tip

GE

awesome, thanks

so all you have to do with the eccentric bushings from whiteline is just replace the stock ones with these and thats it? no other modifications correct?

Yup they just replace the stock bushings, no modifications to the arm required.

Is the Energy Suspension Bushing Kit similar to this bushing? Like does it help the camber?

when you order these bushings from whiteline, do you recieve just one bushing for each side or is it the set for the rear?

No
It's a set.