Headphones?
 

Hi all
Hope someone can help me on this please.
I have just got a bmw x5 (e53) year 02 it came with a central screen in the roof, and a dvd player and a playstation 1 in the boot all of this is Sony,This all works well,the problem I have is that when sony fitted the screen, dvd and playstation the also supplied wireless headphones for the kids in the back,I cannot find any reference to the headphones on sony,here or on any other web site , If sombody has the said headphones could they give me a part no or does anybody know where to get them from (uk please)

Thanks in advance