I found this great deal on islandvapeuk, they are giving away loads of coils for older tanks, you just need to pay P&P.
https://islandvapeuk.com/collections/free-coils?page=1&sort_by=price-ascending
They say you can order as many as you like, but don't take the micky.
https://islandvapeuk.com/collections/free-coils?page=1&sort_by=price-ascending
They say you can order as many as you like, but don't take the micky.