Yakima roof rack question

Does anyone know the availability of the lengths of extruded rubber inserts that fit into the top and bottom channels of the Yakima crossbars or a replacement solution. I have a slight whistling problem and want something to go into these crossbars.

Navi

88.4 cm is lengths of Yakima crossbars, lengths of rubber inserts about 84-85 cm I think.

I meant the availability of the pieces themselves, replacement parts or some other kind of rubber pieces that would fit into the channel.