K so they did main timing chain, coolant pump, phasers and solenoids. They did not do tensioners and guides, or secondary chains. Tensioners and guides are always recommended to be done at the same time.
Anyway, here is the official list of parts involved in the timing system
17 AT4Z-6268-C Timing Chain
EXPLORER; PRIMARY
$68.07 $46.97
17 7T4Z-6268-CA Timing Chain
EXPLORER; SECONDARY; W/ TURBO
$23.48 $16.20
18 7T4Z-6K254-AA Tensioner
EXPLORER; W/ TURBO; SECONDARY; RIGHT
$42.37 $29.23
18 7T4Z-6K254-BA Tensioner
EXPLORER; W/ TURBO; SECONDARY; LEFT
$50.85 $35.09
18 BA5Z-6L266-B Tensioner
EXPLORER; W/ TURBO; PRIMARY
$37.15 $25.63
19 BA5Z-6B274-A Tensioner Arm
EXPLORER; W/ TURBO; LEFT
$23.43 $16.17
19 BA5Z-6K255-A Tensioner Arm
EXPLORER; W/ TURBO; RIGHT
$22.67 $15.64
20 BA5Z-6M256-A Chain Guide
EXPLORER; W/ TURBO; PRIMARY CHAIN; RIGHT
$12.08 $8.34
20 BA5Z-6K297-B Chain Guide
EXPLORER; W/ TURBO; PRIMARY CHAIN; LEFT
$12.32 $8.50
7T4Z-6M280-C Control Valve Solenoid
EXPLORER; W/ TURBO
$83.37 $57.52
minus the cam/crank sprockets.