Not sure about her door in particular, but www.grandglassdoors.com has a wide selection. That exact style of door is there in solid mahogany. They only sell to distributors, but it's still nice to browse them.

Thanks abdrury!

Thank you!!
This was an area that I was at a loss for how you found doora like this, and the first place I went to wasn't much help at all.
The door is a 5080 arched top door but I don't know anything more specific than that...I'll try to look through our stuff but I don't think I have any more info on it.
It ended up coming from the place most of our building materials came from (lumber, shingles, windows, doors, etc) that our builder uses called Ridout Lumber (here in Arkansas). Whenever we went to pick out our windows and doors this is what they stock for the 5080 arch top doors. It was 2400 which was the same price my family that has a building supply store could get it for by ordering it. They said since they stock it, they are able to give a much better price so I would try to find a place (like a building supply store) that stocks the door. Ours has the 6-lite and the 4-lite was actually much more expensive because they didn't stock it and would have to order it.
The door is stained to match our walnut flooring; I basically just told our painter I wanted it to match our floors and let him have at it! Luckily, it and our cabinets, turned out beautifully!
Hope that helps, somewhat! If you have other questions, I would be happy to try and help answer them as best as I can!

Thank you so much, very helpful info. I'll show the photo & the description to my builder.Thank you for including the price, it's nice to know this is in range, nothing worse then falling in love with something out of reach!
Your home is gorgeous!