Ticking near Alternator • Not Valves

Howdy Gang,

Heard a tick tick tick as the wife pulled away this morning in the Taco.
'07 V6 TRD SR5, 65k miles.

I stopped her and got under the hood. I know the valve tick noise quite well and this is not that. It seems to be coming from right side of the engine bay, near the front. I want to say its around the alternator or other pulleys on that side of the motor.

Any thoughts on what to look for?

 

A playing card? J/k

Think it's in the alternator? Or could it be an injector on that side? I'd start with a stethoscope or a hose to my ear and search for the sound.
You can pick up a cheap one that works from HF.