if i understand correctly its like the puny bone mission on caly.. one time, 1 pt of stam
prolly cost a lot more tho for the wings.. b/c there are about 10 people on cyrene at a time
It's indeed a mission, and it was added in December 12 VU.
Not quite sure if repeatable but I'd expect it's not.
The system is copied from Calypso bone samples, with one difference - pleak wings can be traded on auction. (Current price seems to be about 20 pec/piece but I'm not sure about supply of people ready to pay 2 kPED for a point of stamina.)
Drop rate is 10...12 wings/100 kills, there are three-and-a-half pleak spawns but most of time there are several people at each of them so launchers might not be a good idea.