How come so few re-paints of default FSX aircraft.

Firstly, may I stress how much I, and surely others appreaciate the great efforts that people take to create repaints of FS aircraft.Especially giving them away for free :)But I have found there are very few repaints of the default 737 and A321 for FSX.I thought the painters would have liked to create the "first" repaint of so and so an airline for FSX etc.Just wondering if people have works in progress because Id love some more repaints :))))thanks