The piece, called Game Changer, is on display in a corridor at Southampton General Hospital.
Abu-Malek Al-Shami says he would pay the ultimate price to continue his artwork.
The artists’ work was destroyed to make way for high-rise apartment blocks.
Steve Lazarides is releasing a book, Banksy Captured.
Devolved Parliament went under the hammer in London on Thursday.
The graffiti artist said the card company is contesting the trademark he holds to his art.
The piece, Devolved Parliament, is the Bristol graffiti artist’s largest known canvas.
The artwork in Port Talbot is set to be removed and taken to a new art gallery on Wednesday.
The artwork shows a large ship floating in the city's Grand Canal, surrounded by the Bridge of Sighs and outraged men steering gondola.
It shows a child clutching an Extinction Rebellion sign while crouching near a plant shoot emerging from the earth.