I am not the original poster, but since you asked, I feel obliged to answer your question.
A private message (PM) is, imo, ALWAYS the best way to inquire about a Trading Post ad. This is not possible for very new or inactive accounts, but neither of those limitations appear to apply to you.
Another universal truth is that replying to a 7 year old post in ANY forum will, in the best case, result in no reply. Rather, it is more likely that some crotchety curmudgeon with too much time on their hands will call you out for doing so.
I hope this helps. Best of luck in your search.