dssur
+1y
it uses e36 (92-98 3 series) front suspension and e30 (the older 85-91 3 series) trailing arm rear suspension. The rear uses springs in pockets so thats not very hard, and any front kit that works with any other e36 BMW (92-98 318i, 318is, 325i, 325is)will work on yours.
your biggest problem though will be that your oil pan is the lowest part of the car. it hangs a good 2 inches lower than anything else. This is a big deal, because not only will you lay motor if you lower it, but most strutbag and air cylinder kits only get about 4 inches of lift, so even at full lift you will only get the oil pan 4 inches off the ground. You need a way to move that up first, or I see a manhole cover/pothole/low curb and a oil slick in your future.
airbagit.com is aim, and everyone can generally agree that they dont sell very good stuff.
Other than that, good luck.