Greencorp audio tape is available in back coated pancakes on NAB hubs in 1 mil 19 micron 1100m and 1.2 mil 30 micron 762m lengths both in 6.35mm 1/4″ and 12.7mm 1/2″ widths. Leader tapes in many colours.
Cassette tape is available in 3.81mm 1/8″ x 2200m 7200′ pancakes.