How much would it cost to replace the headlight Plastic lenses

Hello, headlamps are sold only as assemblies; you can't just get the lenses. You have 3 options: 1) Consult your local Cadillac dealership for the original parts to replace them 2) Go online to find an aftermarket source for replacement assemblies that will also work very well and be less costly 3) See your local repair shop or detail shop to have your current headlamps assemblies "restored". They can be cleaned and polished to almost like new condition, for the least costly option of all. www.repairpal.com/repair-shops