I have a standard rear beam and arms from a 96 escos. If you can pick them up you can have them for free (I live in Carluke, Scotland). I have fitted an adjustable beam, and if your thinking of doing the same could save you a few bob, if like me you don't want the car of the road whilst waiting on a new beam and arms. I had to pay a surcharge for not supplying one to convert.
Very good condition no rust at all.

Email me at fromfife@hotmail.com