Yeah, it wouldn't be too hard to stretch a regular earlobe piercing with an 18g and go from there. I had a labret piercing, and after it healed I always wore a ring in it instead of a stud. You're making me miss wearing jewelry in it! I still think it looks supercute but I like looking more subtle these days.
You should do it! Not that I know how it looks on you, but I find a small stud to be more subtle.
Admittedly mine isn't very small, and I have to take it out when I do contacts with the public for work, but I would love a sister in arms. Not many people rock labrets anymore. I make sure to compliment every person I see with one... Which admittedly isn't very often and usually happens awkwardly in a grocery store. Lol