Paul's High Performance made control arms for our Marauders for a while. I don't know if they still do as they aren't listed on their site catalog anymore, but they're worth mentioning as Dennis Reinhart recently sold me my set so he may still have them in inventory. They were roughly $50 cheaper than the Metco ctrl arms, black powder coated- which suits me fine as I'll never see the things.
Handling seems to have tightened some but I installed a rear sway bar the next day as well.
Only install notes I can think of is that it took me 1-3 hours one night. I had the car on jacks - jacks placed on the points recommended in the car's manual about 4-6 inches in front of the back tires I believe.
Be sure to turn off the airbag suspension with the switch in the trunk before using the jacks.
As far as the install goes I replaced the upper ones first and then the lowers next to keep the axle in its position. Used marine grease on the bushings and my torque setting was as 'a hard a pull on the wrench as I could muster '.
Oh... and I think they go in a certain way as it seemed that one end on each arm was easier to push into place over the other.