Smith & Vansant Architects PC Hello,
This is a salvage product our contractor was able to find locally. You might try Carlisle - they have a pretty good selection of wide pine flooring.
Hope that helps.

Eutree Wide Plank Flooring Hello,
We make our Wide Plank floors one at a time from reclaimed and Forest Free materials. If you have any questions about your project please feel free to call us.

Hull Forest Products Our third generation family sawmill mills custom wide plank floors from sustainably managed working forests in New England. We ship worldwide and deliver throughout the Northeast. You can check out our wide plank floors here: http://www.hullforest.com/browse-species-c-1_17_27.html

Smith & Vansant Architects PC Obviously lots of options out there.