For years I've used a Sea & Sea MM II-EX to do underwater photography.  For
strobes I have a YS-90 which has a sync cord attached to the camera and a
YS-30 which runs in slave mode.  I've had good success with this combo.

The problem is that I spend 5-7 months a year aboard my boat in the
Caribbean and there's nowhere to get the film processed (or if there is,
it's prohibitively expensive.)  As a result I'm looking at going digital.  
I was hoping to use the same flashes, but all of the systems that I'm
interested in (that are within my price range), use fiber optic cables
between the camera flash and the off-camera strobe, making my existing YS-
90 useless.

Does anyone know if there's a device that would take a fiber optic input
and convert it to a sync cord?  And in this case I suppose that it would
have to be with a Sea & Sea sync cord connector?  

Slim chance I know, but I thought that I'd ask.

Thanks, Geoff