You should be able to find a link to the original listing in your Purchase History if you are within 90 days of the purchase. Follow the link by clicking on the title, look for any changes indicated in the blue band at the top of the listing, otherwise scroll down to see the item listing.
If you know the item number of a recent listing, try adding the item number to the end of an address like this:
https://www.ebay.com/itm/266760555028
