Aeka GSR

I went to my auto parts store and checked for spark plug number NGK bkr7es-11 that was given to me from this board for my GSR turbo setup. The guys down there said that the part didnt exist, I told them to take the "S" out of the number and it worked (i know the civic SI doesnt use the "S") so was i told the wrong number? Can someone clear this up?

Farnsrocket

BKR7E-11
or
BCPR7ES-11

Aeka GSR

thanks a bunch