I get my Aurifil from
The Quilting Bear usually and they do free shipping so it makes it affordable (not sure if it'll be free to HI but worth a shot - it says all USA orders have free shipping).
You can sometimes find the colors you need from
Sue's Sew EZ Designs and she's going out of business so all her thread is 40% off right now. Once you purchase from Sue she will process a refund back to your Paypal account. It's kind of weird but worth it for the savings you get.