I am struggling finding part numbers for a 2015 limited 4 runner rear coils.

I recently decommissioned my x-rease system, installed front shocks and springs, and rear shocks, (KYB from Rockauto) now the back seems a bit lower. probably because the springs are worn (I tow).

rock auto only shows 1" lift springs (Bilstein B12's) they don't specifiy for a limited though. i saw that 48231 A&B should be right and left but most parts numbers include an additional set.

i also read that limited models rear springs are unique.
I am not trying to lift or anything, just want to go back to stock then put in airbags for towing.

any advise is greatly appreciated.