Can anyone suggest where I might look for tent/awning grade canvas?

I've checked the local fabric stores but they only carry very light stuff.
In orange with pink stripes?!?!?!

Thanks,
...Markus
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'66 "rough looker, on startup blue smoker, ball-jointed,
     hackjob skylit" Westy aka "The Tardis"
                        (british racing green/white)
'74 "gotta new top!" Thing
                        (pumpkin orange)
'78 "in need of a new top" bug 'vert
                        (black, white top)