I would reply to his response letting him know that in 7 days you will have the missing items in good working order, or you will forward his response to the same mailing list used originally. Passing along the facts (his written words) should not constitute libel or slander.
I'm sure some west coasters here would like to know who they need to avoid also!!!!
If he still screws you at least get some payback payments in for your troubles!!!