Rob, are you looking for "best price" or "convinece". Convinece wise I would check Monahans in Weymouth. They might have or be able to get what you want. I know BPS in Foxboro sells powercords and transducers. Might give them a call before heading down to make sure they have the one you are looking for in stock.
Well my problem is at the moment i dont have a credit or debit card. I didnt even think about monohans . It was a display model at my store and that stuff had gotten thrown out by accident.