How much should it cost to have shims installed to correct alignment?

The damage described makes me feel like components may be bent. I'd recommend having the frame and subframe checked at a body shop, frankly. Trying to fix an alignment by adding shims can be effective, and the price doesn't sound out of line. However, if ultimately you have bent components due to the impact that are going to cause other additional issues, it is likely best to address those proactively. Incidentally, toe is the greatest tire wearing angle, followed by camber that is way off. If camber is off only a small amount, I'd likely live with it and see how you fare. Also, caster is not a tire wearing angle at all, but can cause a pull, if left to right the specification is more than 1 degree apart. If the caster is less than 1 degree different left to right, and there is no discernible pull - I'd leave that alone too. Nonetheless, it's for your safety and for prevention of premature tire wear to have the frame checked. Good luck.