cement-based floor leveling compound via truck?
I am looking at ways to level a floor that was once a patio. It's concrete and sloped about 3" over 12 feet. I'd like to use cement-based floor leveling compound, but at the volume needed it's too excessive (and expensive) to do by buying bags of leveling compound at the local home improvement store and doing the work. I'd like to have a cement truck come and pour it - it's going to be somewhere around a cubic yard (small volume for commercial work, I know). I don't know, however, if concrete suppliers offer this type of mix. Any cement experts out there that fill me in here?
I'm planning to make some phone calls tomorrow to see if I can find something, but figured I'd try to tap into the expertise on this board in the mean time.
Any thoughts would be appreciated, including any alternative ideas to leveling the floor.
Joe in PA