Have you tried contacting Lycoming, they are normally pretty helpful
BTW are these what you have found?
http://www.aircbs.gr/pdfsd/Lycoming_...l_Analysis.pdf
http://www.lycoming.textron.com/supp...fs/SI1492D.PDF
As said in the last one
If the origin of the metal contamination cannot be determined, a call may be made to the Lycoming Product Support Department. A good description (photographs, color and quantity, etc.) of the metal may result in placing its origin. When phoning Lycoming or when returning metal removed from engines, supply the complete engine model designation, serial number, history of engine, oil temperature, oil pressures, and any unusual behavior of the engine on the ground or during flight. Do not ship material to Lycoming without first calling the Product Support Department.
9. If examination of the oil filter or suction screen, per the above, indicates abnormal aluminum or iron content, contact a technical representative of the Lycoming Product Support Department at 1-800-258-3279.
Give them a call, without Engine make/ model/ cylinders/ rings etc as said we are all grasping at straws.