Gripper Elastic - source?

Well....my new search is for gripper elastic. It turns out that the
fabric stores have stopped carrying it (except some of the Hancock
stores still have some very stiff wide stuff for waistbands).
Does anyone know a source for rubberized gripper elastic....the kind
you would put around legbands in lycra activewear shorts to keep them
from riding up.
Thanks in advance,
Joy
.