I beleive you may be referring to the Camber struts, thrust arms, rear control arm strut, and rear axle tie rod (the links of the 5 link rear suspension). If you are a weekend mechanic you will capable of doing this job yourself. The parts can be purchased here at PartsShop. One of the hardest parts of doing this job is indentifying and purchasing the parts, as you can tell by your responses.
For the procedures on the rear suspension, I recommend the Haynes Mercedes-Benz 190 manual available at most large chain parts stores. It was written for 4 cylinder gas models, but the suspension, transmission, brakes and driveline will make it worth your while. The 201 Chassis cdrom doesn't explain things too well. Let us know what happens.
1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T