Looking for Wing Tip Skids

It's time to replace the yellow rubber wing-tip skids on my Discus-B.
They are 5.75 inches long, 1.3125 inches wide, and about 1.0 inches
tall (hard to tell when they're worn down). Tim at W&W doesn't have
them anymore, Cumulus Soaring doesn't carry them, and Eastern
Sailplane (assuming they actually have them in stock) wants too much
for them.

Certainly I'm not the only sailplane pilot that needs these .... can
anyone provide information?

Thanks.
Mike J.