On my front door hinges both of the oblong springs that hold the doors open are broken, so the doors just swing freely and won't stay open, which can be a hassle if you're unloading stuff. Can I replace those springs, or do I have to replace the whole hinge? And if I have to replace the hinge, what years should I look for at the junk yard to replace the hinges on an 88 240DL? Are the front different than the back?