Take SI boots and SI binders and throw them in the trash. Seriously, out of all the step in systems Burton's was the worst. Not to mention that stuff has been out of circulation for at least a half decade now.
Update her gear. If you are on a budget, spend the money on the boots. Brands I would stay away from are DC and 32. Both brands seem to have a much higher rate of warranty issues. Also stay away from budget brand boots, like Morrow, Lamar, 5150. They are even worse than the DC or 32 brands.
Burton, Vans, Salomon, Nitro, Celsius, and some others all make a quality boot. Look into a speed lace or BOA system. If you go BOA (recommended) look into the Dual "focus" system. It's much easier to get a great fit with that. Of course regular old lace ups are fine. BOA and most of the other speed lace systems are now very reliable and easy to use.
Union, Raiden, Rome, Ride, and K2 all make great binders. If you are looking for a quicker binder. The K2 Auto, K2 Cinch, Flow, and Raiden all have quick entry models. The K2 Auto being one that tightens the toe strap when you tighten the ankle. They worked out the kinks from the first year's models this past season. It's a very reliable and easy binder to set up. With Flow, the Muse and above are good women's binders. Stay away from their budget binders as those always seem to be the one's that have problems. You might still have problems getting into them in deep snow too.
I can probably go on and on. Find a good pair of boots for her, and then go binder shopping. Most places are having insane sales right now, so you should be able to find quality gear at a good price.