generally, this is a dealer issue but don't know how old yours is.
is the plastic splitting or is the canvas detaching from the plastic strip?
you can contact a canvas repair shop who could get the part from the canvas tent end manufacturer.
as far as i know, all hybrid tent ends should have a manufacturer's tag on the inside.
mine is from T.J. Snuggles in Ind. and i've seen others have General Tent, also in Ind.
FR uses T.J. Snuggles for the Roo and Shamrock hybrids but not sure about the Surveyor ones.
and yes, pics would help.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC