commutercar

I tried a search and could not find anything. I went to honda today because my rear hatch window trim which sits below the window came apart at the end in the passenger side. I looked at the manual and found a diagram with just the molding/trim end. I ask the part guy for the trim/molding end and been informed that I would have to buy a brand new trim piece to get the molding end because it was one piece. Is this true? if no t can someone tell me where i can acquire this piece.

Thanks