Responding again to Terri, who is looking for "4mm rubber cord in a
pale yellow and a red brown". www.simolex.com/html/cord.html has
silicone cord "in FDA White, Translucent, Gray, Blue, Black, Red,
Green, yellow and other colors" with "Most Standard sizes available
from Stock" and "Round Cross Sections from 1/32" Diameter to 2.00"
Diameter." www.simolex.com/html/cord_04.html shows yellow cord but it
may not meet the need for pale yellow.
Simolex is a manufacturer that makes custom products. They take
credit cards. They say they are "flexible like rubber".