Right off the top of my head:
127x1 sizes 12, 14, 16, 18
206x13 sizes 12, 14, 16, 18
20x1 sizes 12, 14, 16, 18
Schmetz still offers the 206x13 in 12 and 14, but we do use heavier thread on heavier materials and also need the 16s and 18s. Same comment for all needle systems.
Joe