Interchangeable parts with different brands? When it comes to plumbing, chances are slim to none (unless otherwise indicated).

Thanks for the answer, homebound. It did seem too easy.

I guess when it bothers me enough, I'll just have the whole thing changed out.

Here's an alternative solution. If it's metal (not plastic), take the spout to a place that does powder coating. They probably won't match the color exactly (or maybe they will), but it might work.

I did that for one of my clients. The only problem was that when we coated the shower valve trim, the coating added enough thickness to make it a real pain in the rear to slide it over the cartridge "collar". Think it through carefully with all the parts you are considering.