They are perfectly suitable, but I bet you can find a 100pF 100V C0G capacitor for less than $1.50.
C0G/NP0 is the ideal replacement in this application. There's no reason to use silver mica caps unless you need very high voltage ratings.
C0G/NP0 is the ideal replacement in this application. There's no reason to use silver mica caps unless you need very high voltage ratings.