A: Hi! Here is the link on the website for the same model in white: https://www.homedepot.com/p/Endura-Flap-12-in-x-23-in-Thermo-Panel-3e-Fits-Patio-Door-77-25-in-to-80-25-in-Tall-in-White-Frame-01PPC12-QW/300358514 Hope that helps!
A: This door can work with various types of sliding doors. The most important thing is that the sliding door has a track on the top, bottom, and side that the pet door panel can go into. Having a track be able to hold the door in place provides stability, and if there are no tracks for it to sit into we would recommend actually screwing the panel in place. The pet door panel is also only 1" wide and some newer vinyl tracks are more in the 1.5"- 2" range. Customers have shimmed in at the top and bottom to make up for any wiggle room in front or behind the panel. Or they have toe-nailed the panel in, where the screws are installed at an angle to go through the panel and into the track, making the installation more semi-permanent. In other cases the doors have fit in just fine and been perfectly stable, even if the facing of the frames are not flush with each when viewed from the interior of the house, it is merely an aesthetic issue. Many customers have to go with the aluminum sliders simply because the doors specifically for vinyl have very limited flap dimensions and height ranges available.
A: With the panel you would still be able to use the sliding door. Although be careful to check out the width of the pet door, since you will lose that amount of space to move through. In some cases with small sliders and larger flaps it makes the room to get through very slight.
A: You can use the Thermo Panel in dual pane sliders. It just might not be wide as the track so it would follow the same possibilities as with vinyl doors. So possibly shimming in at the top and bottom to make up for any wiggle room between the panel and the track walls. Or they have toe-nailed it in, so screwing the panel into the track on the top and bottom, making the installation more semi-permanent and very stable. In some cases (mine included) the doors have fit in just fine and been perfectly stable, but the frames are not flush so you can tell the panel isn't as wide. This is really just an aesthetic problem and personally I don't have any stability or sealing issues.