2.0 Twin Spark expansion tank cap finding one

[gshughes]

I was a bit of a numpty and drove off with the cap just resting on the tank. I now need to source a new one.

My car is a 1997 GTV

My local Alfa Dealer says they will have to order one from the factory.

1) Does anyone have any idea where I can get one a bit more easily/cheaply ?

2) Would the cap from any other make/model fit ?

3) Is there a good Alfa forum to post up the same enquiry ?

Thanks a lot.