That seems like a lot of money for a couple of spacers to lower (or raise) the tie rod ends. Personally, I probably might be persuaded to bolt up what you have and see how bad the bump steer is, unless your current outer tie rod ends are wore out and need to be replaced anyway. If the bump steer is bad enough to bother you, you can always spring for the spacers at a later date.

I've been called a cheapskate before, so take my advice accordingly. Gene