2012 Jeep Wrangler 46K miles

I took Jeep to dealer because of check Engine Light. The Dealer tells me I
need a Cylinder Head which is covered under Warranty.....also new Rockers
Arms and Camshaft.....Repair cost $1240.00. I ask how soon can get car
back they tell me in a 2 days.....I questioned the need for Rocker Arm and
Camshaft and how did they determined this was needed without removing
top of engine....After all the car was running fine!! I declined the Rocker Arm
and Camshaft repair only wanting the Cylinder Head repair covered under
Warranty. They told me the Cylinder Head was on backorder and it would
take 3 months to get part........UMMMM....but If I had agreed to the $1240.00
repair they could complete all repairs in 2 days including Warranty
work.....Are there any honest repair shop in the DMV that will complete the
Warranty work??