Here's a couple of pierced ear options - http://tes.nexusmods.com/downloads/file.php?id=22694 and http://tes.nexusmods.com/downloads/file.php?id=11721.
The problem you're going to have with using an "ear resource" is you'll never match the colour and tone of your head mesh. They'll stick out as obvious.
My suggestion would be to find a Race mod that you like and use the head and ears from it.
Thanks for these I will check them out.
I know exactly what you mean, because I have been doing exactly that, looking at race mods. Problem is that the only ones I've found so far either REALLY don't match or they would but I cannot locate the proper nif and associated mesh files for them, which is a pain...