I wouldn't bother replacing R1 or C1, I'm sure they're fine.
D1 is a BAV74 dual diode w/ common cathode.
U1 is a TPC6201, but it's obsolete. So use FDC6561AN as a replacement part.
Edit: But if you want to replace C1, it's a 100nF 0603
R1 is a 15K 4-resistor array. Example
https://www.digikey.ca/products/en?keyw ... B-38V153JV