Classic: https://www.curseforge.com/wow/addons/get-link-classic

Get Link lets you search for item links by an item's name.  These links can be used with any tooltip modification to look up information.

Type /gl or /getlink (text) to search for an item.

Troubleshooting:

'/gldev purge' then '/console reloadui'.  If you do this too much Blizzard will temporary block you from retrieving item data in the way needed by the addon.

If I'm late with updates change nTopID in GetLink.lua to a higher value.  It will be very close to the top of the file.