What is this extension cord

Recently I went on an international trip. I have a 100w type c gan charger (This one). I picked it up since it had the international adapters. Well after being on a turbulent plane and getting up and down the plug would fall out. Also a few places I stayed the outlets ended up being a little far away or in an inconvenient location. I started looking for extension cable as a solution but after searching on amazon I found they make an extension cable that plugs into the block like the international adapters do. Without buying a new charger with the cable. Does anyone know what the cable is called or a link to just the cable. Heres a link to a charger with the cable (here).

UPDATE - I found the cable but does anyone have a link for a non-aliexpress purchase (Link)