How can I reduce my camber?

So as I thought I could get most of my camber adjusted out when I got my truck aligned I was wrong.. They just basically told me they can't do anything and I need to raise it back up. So now im kinda stumped because I cant afford to be chewing thru tires.. Basic drop, turned and reindexed torsions, 16" wheels. Ive read that 2" drop spindles you need at least 17" wheels? flipping the bj's kill the ride, and put alot more stress on them... So what else?

pie cut your upper control arms

you can do 16 inch wheels depends on the rims I had a set of 15 inch center lines that worked with drop spindles I did cids truck on drop spindles and air and actually had very little camber issues

Your not going to tear through tires with a drop like that. but yes pie cut and the 2" spindles

he will if he has alot of camber ask crazymikey before he did drop spindles he went through a set of tires in 2 weeks

This is something maybe I have over looked? How exactly is this done.

there is a write up from dev on here best how to on the site

Why not just pull the shims out of the upper and let bolt closer to the frame

Ive read about that, and I assumed thats exactly what the shop would have done. I looked around the other day for these shims and I couldn't spot them, got a pic?

the shims are going to be inbetween the upper control arm mounts and the frame, in the engine bay. look down below the wheel wells. the shims should be there if you or the shop hasn't removed them. they come on there from the factory.
heres a fast find of an s10's uppers with shims. mazda looks similar (but not exactly the same)