Dear Robert Sorry that I do not have a answer to your question, because like you, I too am searching for wooden gutters for my home without any success. I have no idea when the house was built, and my gutters are starting to rot; which is like a death in the family.
I have been reading you message and hoping that you will get a response that I can also benefit from, but it seems as though I have to surrender to the aluminum gutter alternative.
If you have had any success that is not posted, would you be so kind as to share that info with me. I must replace my gutter by the end of August so if I do not hear from you by then it would be too late. PS Is there any value in the old guttering? Do you have any idea when wooden gutter was last manufactured?