I had collected these part numbers a while back to help evaluate and consider options if I ever decided to do this as a future project.
For a 2010 w/ 5.7
Prices where quoted as dealer list.
A/C
55038714AA > $119
55116909AD > $72 (note Scorpioncrawler listed $26.70 for the same #)
Heater
68000979AA > $20 (supply)
68000978AA > $27 (return)