Rb, you are getting the run around by a poor repair shop, period. There is no reason a professional painter who paints collision repair for a living couldn't match ANY color to within reason. If this was a bumper or something that has to be "butt" up against the original color, then it is YOU who may be asking too much. Most of those colors are going to be off a little. I work where we do brand new never yet sold Toyotas and some of the bumpers are WAY different in color. This is the norm, but with most other repairs where a fender is replaced or something like that, you really should see very little to no difference. Between blending out the color to simply hand matchnig it, be damned what "versions" of the color are available. If you are a pro, you make it work.
Just what was replaced or repaired on the car?