You might look to see if they have any windows that you could re-purpose. Depending on the size and lay out of your coop, windows might be a good option for doors. Plenty of glass to let in the light. I bought 2 aluminum combination windows, complete with full storms and screens to use in my green house. Made the doors by framing around the windows, and mounting them in the door frames so they were about a foot off the ground. That gave plenty of head room, and extra clearance to allow entrance with snow on the ground. Allows good ventilation with infinite adjustment.I visited the habitat store this week, and came home with 2 tempered glass window panels about 30" x 74". (paid $5 each) I think they'll fit perfectly inside my hay bale cold frames to give the second layer of protection, effectively bringing the microclimate up to Zone 8A while letting a lot of light in! That store is my favorite place to shop. They had a whole load of cabinet doors that I think were made of Ash, and brand new, selling for less than the wood could be purchased. I was scratching my head hard on that one, trying desperately to find an excuse to buy them, but had to walk away, as I honestly couldn't come up with an idea for the use of them!
I love that store!! I think I need to pay them a visit. I need new doors for my coops and I think that some cabinet doors would be perfect! Mine are falling off and don't close very well. They leave gaps and the wind gets in them.