I would say that you're screwed untill you can get to HomeDepot or a hardware store.
Then you can buy some plumbers strap and a piece of rubber and make one untill you can buy a new bracket.
On 2nd thought,some wallmarts are open 24 hours a day and they should have the plumber strap and some type of something to keep it from scratching the pipe.
Plumber strap = 1/2" wide thin metal band with holes in it every 1/2".
Then you can buy some plumbers strap and a piece of rubber and make one untill you can buy a new bracket.
On 2nd thought,some wallmarts are open 24 hours a day and they should have the plumber strap and some type of something to keep it from scratching the pipe.
Plumber strap = 1/2" wide thin metal band with holes in it every 1/2".