If you need other combinations, you can check the inventory website:

Level 20+:
http://xhxgame.cloud/item?id=2&user_id=10013

Level 8 {slightly more expensive}:
http://xhxgame.cloud/item?id=2&user_id=10014

Choose the combination you like, copy the combination code and send it to customer service to inquire about the price.