I know that
www.tirerack.com carries the camber adjusting bolts. Check the suspension section after choosing your car.
They may not be the cheapest site for them, but they're very reputable.
The wobble may be due to alignment (if it's pulling), the balance of the tires (if it's a shimmy) or the lack of hubcentric rings. First off, check the tire pressure and adjust as necessary. Then, jack one corner of the car up so that the wheel is off the ground, loosen all 4 lug nuts, make sure the wheel is centered, tighten the bolts in the recommended 1-4-2-3 pattern (clockwise or counterclockwise), and repeat for the other 4 wheels.
If that doesn't work, take it back to the shop that mounted them and ask 1. for them to check the balance, and 2. get hubcentric rings and try again.
If that doesn't work, and if the wobble / shimmy gets worse with braking, your brake rotors may be warped and need to be replaced. That was the solution in my case.
It could also be a worn tie-rod end, too.