Hi Chen Yajiu, 

Thanks for the message, I hope you're enjoying your 714 AP1's so far. You can purchase a W at any authorized Titleist retail outlet. They will be able to order the club as a custom order from Titleist Singapore. It may take a few weeks to reach the shop as we will then order this from the US. Do let me know if you have any other questions or if I can help further. Thanks. 

Tom Hutton
Team Titleist South East Asia Manager