I did the same thing, car was starting to bottom out on quite normal transitions from parking lots onto streets. Bought a pair of rear used coilover oem shocks and solved the problem, since Eibach springs had settled the rear down 2 inches under stock ride height. I did not have to change the fronts. I used Jack's in Billerica, but using
car-part.com can find you a set closer to where you live, or, anywhere in the country that they may still be in stock. Hopefully, they are not another set of eibachs, so make sure they have the OE color coding. At this point, take whatever you can get, if anything. I assume pappy won't be needing to worry about the center of gravity being too high, lmao.