Hi 1stphonesource.com,
The link that is located directly beneath the "Choose Item Specifics" link on the Auctiva liter page is the "Custom Item Specifics" link. I reviewed the first couple saved listings in your account and this link was present in each of them, so hopefully you are now able to see this link to.
If you are still unable to see the "Custom Item Specifics" link within your account, please contact our customer support department using the appropriate link on our help page:
http://www.auctiva.com/free-auction-software-help/help.aspx-Mike