10.816 mhz crystal substitution?

TimePiloteer

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Am working on a Space Panic pcb whose crystal legs disintegrated. It's a 10.816 mhz crystal which I can't find anywhere. I replaced with a 10.0 mhz crystal but the board won't sync video, even though Sync pin is pulsing and inputs and outputs on the sync related chips are all active. I'm thinking the clock frequency is just not right. What might be a closer substitute? Would a 10.7 work better?
 
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