These jumping mats are suitable for your trampoline:

Jumping Mat for the Trampoline Spartan 244 cm
  28 
In Stock
Separately sold jumping mat for a trampoline, high-load resistance, waterproof. Buy
Trampoline Mat - 244 cm
65,50 € (38%) 40,30 
In Stock
Separate landing mat for 244 cm trampoline Buy