Does anyone know if it is possible to use a 48" NForce light bar without the breakout box? Bought one used and didn't realize until I brought it home that one was needed, seller cannot locate the original. Would a Federal Signal serial interface module work the same way? I see them for around $30 on Ebay and it would sure beat the $160 that I would have to spend for a new one from Sound Off. Any information is greatly appreciated.