Innova IFA-36 is worth a look if you can drop to 60 inches. Keith at NorthlightImages used it recently for a large print:http://www.northlight-images.co.uk/article_pages/14m_pano_print.html
I have been testing it recently, but haven't come to any firm conclusion yet. It prints well, has a good dMax, and the surface is resilient. The only problem I have had with it is the amount of cotton dust wrapped with it. I have to pull the length I want through the printer and dust it off before printing.