You've posted about that a couple of hours ago and again a few minutes ago in another thread, if you haven't heard from anyone yet or at all, that doesn't mean the forum is hard to navigate.
That being said, when looking for SteelBooks, best to post in
this thread as it's more frequently visited by potential sellers, however you need to have 20 non-spammy posts to access that section, you're already at 6, so participate in conversations around the forum and the section will automatically unlock after 20 posts.
For future reference, tag/mention a mod if you need to grab attention for support, otherwise some posts may not be seen in a timely manner, such as the couple above.
Good luck with the hunt.