4 inch springs

I am looking to install 4” springs on my 2004 LJ which has a 2.5” EMU lift already. Is there a preference on brand, constant coil and should I use a taller spring in the rear being an LJ so that is level?

If anyone has some 4” shocks and springs and are willing to part with either for free or cheap please let me know I will take care of shipping through FedEx. I need at least the springs because I’m fixing up the Jeep for my daughter and it’s currently on a 6” lift which actually has 7” lift...

Looking to buy 3.5 or 4" springs. If anyone has any let me know!

Removing my 4 inch lift, so I'm going to get rid of the coils and sway bar end links. Both have surface rust on them, all 4 coils look almost identical to the ones pictured. Back measure a perfect 12 inches, front measure 16. No sag, perfect operating condition. The end links look a little...