If you like gnome-shell & also happen to like the unity amazon shopping lens then there's this new ext.
Works well in 3.6.2, if forced in 3.7.x it works but icons are small
By default it only searches amazon from "a <whatever>", not <whatever>
May need configuring on size to get at least 2 results per line, ect.
(the default affiliate code can be changed as seen fit...
Edit: just noticed 12.10(updates) has Gs-3.6.2 so likely this thread doesn't belong here