Source for Brass Roll Pins?

[Kevin Trent <trentkc@domain.elided>]

I am rebuilding a 1750 engine that came out of a 71 berlina.  When I pulled 
the head from this engine I found a set of those brass roll pins for the 
oil passages.  I've heard of these things and they do look to be far 
superior to other products sold for the same purpose.   The ones in this 
engine are made of thin brass tube with a "donut" or bulge in the middle to 
prevent them from sliding too far into the block or head.  The square 
vitron O rings fit around the bulge perfectly.  Unfortunately, one of the 
six is damaged.

Does anyone out there recognize this kind of brass roll pin and can you 
tell me where to buy a set?

Thanks, //KCT    
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