Photo 1 for West Marine Abaco 13.5 Tandem Sit-On-Top Kayak, Lime/blue

Good afternoon. I am looking to purchase two of these kayaks, but am wondering about shipping costs as I live in Sydney, Australia. Can you please let me know an estimated total cost for 2 including shipping? Also, if you also sell accessories, how much for 4 seats, and 4 paddles? Thank you!