Tty checking with a machine shop-the ones that faricate parts,not an engine shop- some of them do wheel repairs. Before you condemn the wheels, have them checked at another tire shop, the balancer at the first shop may have been out of calibration or had a bad arbor. I do know that some shops will tell you that your wheel is bent to cover for tires that take exessive weight due to out of round/heavy tires. I work in the tire business and have seen all the tricks that some places will do. If there seems to be exessive runout, have the tires taken off and check the wheels bare, that will take the tire out of the equasion.
One more thing, make sure that the lug nuts are torqued to the correct specs. That can cause a vibration if they are uneven, and can warp an axle hub or wheel center.
