You can try Jim Rodman in Hannah IN. I just priced door wood from them about a month ago but opted to make my own due to the cost of it. If you have enough good wood left making your own isn't super hard if you have the right tools. Either way weather you make or buy it is tricky to install. The door frame with the metal and the wood was crafted first, then the skin was applied after. There will be fasteners of the wood frame to the steel frame that are hidden once the skin of the door was applied. You don't want to un-skin a door, unless your an expert body man I guess, then maybe. I've read some guys cut out small areas of the door skin where the fasteners are and then weld back in once wood is in place.
What I am doing (and others have if you search out the topic) is getting creative with installing and fastening the wood similar to how it was using things like T nuts, creative mortise and tenon joints, etc.
Search it out thoroughly through the search box on this site and others and you will find the answers you seek. I'll help out if I can.
If you want to contact Rodman I can help you with that too as I have a number for someone who works for him otherwise it's hit and miss trying to get him to get back to a person. Out of courtesy to that person I'm not going to put that contact out here for all to see.