I guess 56.75 and 53.25Mhz implies overtone operation of lower-frequency crystals, whether the third or fifth would depend on the circuit.
You may find it cheaper to use a couple of the modern 'programmable oscillators'
for example
https://uk.rs-online.com/web/p/progr...lators/5062205
or
https://www5.epsondevice.com/en/prod...r/sg81_91.html
and perhaps adapt the existing oscillator circuits to operate as buffers/triplers/quintuplers as needed.