I am looking at a used Aqua Leader Evasion and it will need a new Liner. It is a 27ft round, but when I look at the true specs it has a true radius of 13’ 4” (4,07 m). Do I have to purchase a Aqua Leader liner or can I just buy any beaded 27" liner online? My local pool store wants $425 for a plain blue 25mil. PS What style beaded is it?