I have an Orion medium aluminum accessory case, item #05984, that is new in the original shipping box. The foam has never been cut and it's still in the plastic bag, and includes the keys and carry strap.
See a description of this item on Orion's web site - search for item number 05984. Outside measurements are 13"x9"x6". It sells new from Orion for $32.95 plus $5.95 shipping. (Note that the search result will initially say $22.95, but that is for the smaller case.)
I'll sell mine for $27 plus actual shipping from Richmond, VA.