Don't be silly, parts are dirt cheap and plentiful thanks to the 2.7.
I would not hesitate a trip to the yard and yank what you need. I have two sets of injectors and a spare TB right here. Anything fuel tank related well that'll have to wait until I make my trip to the yard this week.
I had an issue when I cold started my 3.5 during the start of the colder weather it would "chug" like a bone cold flooded two-stroke chainsaw. It wouldn't die, just take a moment to rev up and make a sound.
Turned out to be excess oil in my plenum (PVC valve), leaky injector, miserable performing IAC. Do a fuel system pressure check, and go from there is my suggestion, but there is some food for thought.