I think I may have an answer. There are Stronglight 86 BCD chainrings with smaller holes made for the 106 and 107 triple sets. I guess I bought the wrong one :-(
I have a 28t ring that will work for you (10 mm holes, 12 mm counterbore) and I'll trade if you want. I can send a pic or two if you're interested.
I can use the one with small holes for a Campy Super Record triple conversion. Is it ironic that the bolts I will use for the granny are Stronglight? made for a model called Mygal.
Mark B in Seattle