stem for oversized bars

hi all
i need a longer stem for my prophet, but i'm not really sure what length i need so i'm hoping for a try before you buy arrangement!!!
does anyone have a stem 60-70mm for oversized bars?

thanks
S

http://www.evanscycles.com/products/...318mm-ec008877

I have one old model of this one, but is 100mm if you want to give a try.

Mario

I have a 75mm one you can have

cheers Max i got a lend of a 70mm one, so i'll see how i get on with that on Thursday...