Try canvasreplacements.com
They might say the same thing as Bear Creek though.
Your next step would to try and find who manufactured the tent ends.
Either from someone who also owns a 2003 Stampede or contact Palomino.
On Forest River Forums, a rep for Palomino hybrids is a member there.
He goes by Palomino Pal.
He might be able to help.
Dan- Firefighter, Retired:C, Shawn- Musician/Entrepreneur:W, Zoe- Faithful Golden Retriever(RIP:(), 2014 Ford F150 3.5 EcoboostMax Tow pkg, 2016 PrimeTime TracerAIR 255 w/4pt Equalizer and 5 Mtn. bikes and 2 Road bikes