I dunno. If you are in the US, try contacting B&H PhotoVideo in NYC. They have some VERY good chat specialists. You might get bounced around between chat people until they put you in touch with the best person to resolve your issue.
[EDIT] I suspect some type of wireless remote trigger, like one might use with a strobe system, might do the trick. One trigger with two receivers. I am uncertain with exact synchronizing.
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