Campag spares

somehow or other the crank bolt that threads into the crank arm of my Chorus cranks has come undone. No idea when, and not sure how i didn't notice because i have a small dent in my chainstay where it came out.

I have a few bolts that seem long enough but i don't have any spacers! any idea if these are available officially, if not a trip to the LBS and bodge it with a few washers will be in order.

Not my year, one frame has rusted through, another has a damaged bottom bracket thread and now the third bike has a dent in the side of the chainstay.