DarcyDee,
It looks like your filling out the lister form correctly, the "Custom Item Specifics" link should show up directly above the UPC label. I tested right now and see it for that category. If you have not done so already please fill out a support case, so support can review. It may be possible you have a javascript error in the browser that is stopping the Custom Item Specifics link from displaying, as it displays dynamically based on the category selection. Do you see a little yellow triangle with an explanation point in the lower left corner of the browser (assuming the browser has the status bar enabled)?