Need Used 9" front DRUMS...didnt know new drums would screw me up!!
Since you already have the drums, most machine shops should be able to swedge the drums to the hubs/studs. Then have them turned AFTER they are together. You'd be shocked how out of whack they can be sometimes.
Alternatively, put the drums on the hubs and tighten them together with the lug nuts upside down (taper facing out) and a couple of flat washers. Then have them turned. When you take the nuts off, mark the drum (a smudge of paint on the drum and an adjacent stud) to make sure it goes back on the car the same way as when it was turned.