You could get an F-2B, send each pickup to it's own channel, then combine the output as mono and send through a DI box to the board.  Or send each channel separately to a two channel DI box, or something like that.

I'll look into that.

I have radial Pro-DI box passive DI box for that use or when travelling light with just my series bass. The pad switches cope with the output from the F-2B if you wanted to send that sound to the PA rather than direct off the bass.