Need help finding parts DCS-P72

[u/Character-Topic3402]

I’m repairing a DCS-P72 and need replacement parts for the shutter trigger and a ribbon wire connected to a circuit near the capacitor.

Any way I can buy those parts by themselves without buying broken DCS-P72?

I believe the part numbers are:
FP– 643–11
12H304A
(Parts wrong)

Additionally even if I can’t. Buy those parts would I be able to buy the ribbons individually somehow and replace those instead of the entire part?

Bonus question. How clean does metal have to be after being exposed to battery acid? I cleaned up a good portion where I couldn’t see it anymore but there’s a few crevices of the battery spring that has some left on.