I just found one on ebay yesterday and ordered it.
Unfortunately the one you suggested MNS is actually a FM transmitter but thanks for you help any way

Oh yeah and Mr Bender I have found a sort of solution for training with a large iPod.
I was given one of those fm transmitters for my birthday to use in the car. So i brought a teeny tiny fm radio with head phones that i can clip in my hair or on my shirt. then i just stick the ipod in my bag and tune the little radio to the same channel as the transmitter.
It is a little bit complicated but i found it worked quite well and i don't have to worrying about breaking my fancy iPod. Oh also the little radio i brought is one of those ones that you can use in the pool so i can listen to my iPod in the pool while i swim laps. Yay!!