Had you thought of contacting Schaefer?

Frank Gerry wrote:

I have a raised mainsheet traveller that is installed above the cabin top
for my 28 foot sailboat. The manufacturer is Shaefer I believe. I noticed
that the black plastic end pieces on either side of the traveller base are
badly chiped, cracked, and otherwise appear to be about to fall apart.
I was wondering if anyone knows if I can buy replacement parts for these.
And if not, any suggestion as to how to repair.

Frank