For anything but headlights--which are pretty standard--I just go the dealership. Lights in general are
cheap. They should be able to get the part number and part based on your description of which bulb
you're replacing. The only issue I had was they didn't have the coated bulbs, only uncoated--the factory
shifter bulb has a blue plastic coating on it that tints the color. No biggie.
Replacement is straightforward if tedious. Remove the two screws that hold the center console on,
side it off. Then remove the box around the shifter. You may also need to pop the PRNDRL
plastic piece off--I can't remember. Replace the bulb, TEST before reassemblying, and then
you can put stuff back.
You might also make sure your parking brake lever sensor works, lighting the BRAKE light
on the console, since you've already got the patient open.
I strongly recommend keeping this light working, since it's the lowest light in the car, and
clearly visible even on an overcast day when you might be driving with your lights on during
the day. More than once it's saved me from leaving my lights on and running the battery down.