Broken Seat Back Springs

After finding a wire poking out of the back of my drivers seat back, I opened it up to find 5 supporting springs broken. I did a pretty thorough and creative search of the web and here but couldn't find any photos or descriptions of repair/replacement. Looking in there, it seems like it might be tough, but that I should be able to just unhook the current assembly from the frame and replace withe the new one. Does anyone know how much surgery this might take?

I think the part is 72760D on this diagram: https://autoparts.toyota.com/products/product/adjuster-assy-lumba-7276004030#popup-1

Photos of the broken springs:

 

Mine has this too I didn’t notice till I replaced the lower seat fabric mine only has 2 broken ones.