There are many ways to purchase ZWave devices suitable for use in Singapore. You may import from Vesternet (and use a forwarder service) or UK Automation (international shipping). However you may need to incur shipping or GST cost if you order items more than S$400.
Alternatively you can visit the our online store for Z-Wave products. For someone new to home automation, it is natural to feel a little overwhelmed, so do not hesitate to contact me to clear your doubts.
Feel free to drop me an email (firstname.lastname@example.org) or leave a comment in any of the entries if you are keen to start your home automation journey!