Questions about conch piercing?

I want my conch pierced so bad, the only problem is I do a sport where no earrings what so ever are allowed. I figure it will be okay for practice because their main concern is it getting ripped out and since it is in the ear not the lobe it should pose an issue.

The real problem is for competitions no earrings are allowed and they are not even allowed to be taped up, I compete once a month. So I am wondering can you have this piercing done with like a plastic stud with a flat back and screw in head that I could change from a stone to a clear plastic ball? If so would it be noticeable from say 7 feet away?

And one last thing, how long does this piercing take to heal, to the point where I could take it out for 1-2 hours? I may wait until competition season is over but the break is only like 4 months long.