Wanted: Parts for sunroof of Alfa 75

[bteoh]

Hi,
Looking for a sliding mechanism off a sunroof for a 75. It's the part that retracts and advances the headliner for the sunroof. I managed to snap off the metal part that protrudes into the sunroof area whilst trying to remove the headliner for refurbishing.
Hopefully someone out there can help me with this problem. Can't seem to weld the part either and soldering will damage the plastic surrounds
I took a picture of the other side (right side) to give an idea of what part I am referring to. The part I am looking for is for the left handside.
Thanks for any help.
Cheers,
Brian