Digital BW, The Print

I'm working on some large panorama prints that when completed will 
be 4 feet in length.  I have an Epson 3000 printer and would like to 
print on William Turner or Photo Rag but the only rolls I've seen 
are at least 22" in width - much too wide for the printer.  Does 
anyone know a source where I can get rolls that are 17" in width?

Thanks,

Stan