We've been able to grind some Double Broad Raven nibs into S.I.G.s available here while supplies last. 

This is for the whole nib unit, black coated steel nib, feed, and housing. Fits all Franklin-Christoph pens that take a #6 nib. 

Price is $59.

If sold out, sign up for the back in stock notice for when we get another batch made.