It is one unit, I took several pictures so that you would be able to see all sides. I am looking for 12 units, please let me know if you have them or if you can direct me to the right person, it would be deeply appreciated.

I'm afraid that we don't carry this exact pivot shoe. Our 15-177 is similar, measuring at 1-1/4" wide by 9/16" thick. It also uses our Series 152 coil balance, which just screws to the pivot shoe. There should be a spring weight number stamped on the old springs. For the coil spring housing, if you need to replace them, see our 15-150S.