Replacing and entire clip is a heck of a lot of work and chances of finding one without a rusted left side frame rail will be pretty slim. It's a common problem on the left side where the battery often leaked juice or water accumulated. Just buy the special frame rail reinforcing recapping sections and weld them on. I have done six Darts and used the frame rail capping on four and they work great and are inexpensive. The "U" shaped caps just slip over the factory frame rail.