There may be something that's made more for that than regular banner, but I normally just use a 13oz and send it to one of the S101 wholesale printers. Anyone that wants a canvas for something that large that has come to me, is normally installing it themselves and they only care about the price. I've only had this happen probably 5X in 13 years, but so far, it must have worked for all of them because I never heard back.
Just make sure they know it's got no warranty when it leaves your shop if they decide to go the cheap route.