Left hand thread lug nuts on driver side

Boy, you gave everyone here, a severe lack of communication, with your problem(s)
If your studs are broken off in the Rear axle, just get a suitable punch of a big enough diameter, and then wack them out with a BFH. (big f'ing hammer)
They will come right out with a few wacks.
One of your front Drums has already been replaced and un swedged from the hub, so the drum on that side will just slide off and on.
Very common when replaced.
As far as that spring goes, around the outside diameter of the drum, it was originally thought it was going to do some good with vibrations upon braking.
But in the real world, it didn't do much good of anything, at all.
They did away with springs, decades ago, and you will never get a new, replacement drum with a spring.
When you replace the broken off studs on the rear axle, you just suck them back in with lug nut putting some flat washers on the stud before you put on the nut, to "press" the stud back in.
Easy peasy.