look up boutique companies like Praxis, Bluehouse, Wagner, Magic, Fatypus (definitely this one because of the sales they are having plus their skis haul and have been used in freeski comps), Caravan, DPS, Liberty(I have talked to my coach's ex-girlfriend who is sponsored by Liberty and competes at Revelstoke and stuff and she says that for a womens freeski,Liberty makes the perfect one), etc.
Basially, you are going to want a ski with a good amount of effective edge and a mellow rocker profile to prevent unwanted chatter and instability. A stiffer, directional ski is going to be your best bet with a bit of a twin to make pivoting easier on a dime as well as the occasional switch hit. Make sure the ski has a nice stiff tail to support big drops and a turning radius that isn't too massive. Full Sidewall is also recommended (basically no armada's). The amount of camber is pretty dependant on personal preference, but a medium-minimal amount of camber would probably be the safest route to take so you still have plenty of edge grip when the conditions are junk. The sidecut is also a big factor. I am not entirely sure about this, because this is definitely a personal preference area, but 120-110 is proably a good waist width, and you can probably drop it down to 105 if you find a pair that suits you well (although I have heard around 115 is ideal for most people).
Since I assume this is your first time around competing in freeski comps, You aren't sure exactly what you want. I would try to demo a few pairs of skis with different designs (moderate rocker, rockered tip+tail, Moderately stiff vs. very stiff, sidecut, radius, etc.) and find what you prefer the most. I am only recommending a few basic properties for a ski that would do well for most everyone.
We don't need websites to plan our ski days, we just wake up in our car at the bottom of the mountain. -Ribss.