E5SC-5560AA Springs - New shocks needed

Was under the car attempting to locate a noise and saw the rear shocks need replaced. The previous owner of the car told me he put FRPP lowering springs on the car, but I never asked which ones.

The markings on the spring are E5SC-5560A, and below is 132280-2. From what I've gathered through searching, the B and C springs run the same rear springs. My only question is, can I buy any shock for the 02 V8 Mustang or will I need a smaller shock to go with the smaller spring?

Not trying to start a debate on which shocks are the best to go with, just trying to figure out if stock size will work.
 
Was able to knock the undercoating off the shock and get a few numbers.

The rears are: YR33 18080 B 12 V 2A Motorcraft.
I'm assuming they are the stock shocks or a stock replacement. Please help.

I also see now that the front struts are going to need replaced. I cannot find anything on the springs, however the numbers on the struts are:
YR33 18A084 BA, 2 110432.

I cannot see them labeled Motorcraft anywhere, but I assume they are due to the "YR33" beginning numbers.

The fronts and rears are all black. Any help is appreciated.