RE: WACO YMF
Joe,
If you have the proper shears (scissors) with the correct "pinked" spacing you can cut your own biased tapes from the covering fabric, just cut at 45° to the weave. The tough part is cutting the tape with parallel sides.
In the photo of the wing the tip tape starts at the transition from straight to curve (in this case at the marker light base) around to the trailing edge.