There are a number of Z-wave button controllers available. Check out offerings from Zooz (The Smartest House is their store. ), Aeotec, and Nexia. The Nexia NX100 has a capability for 15 buttons with a configurable display for the button labels.
Be ware there are other devices that look like button controllers, but are secondary controllers. They are not really useable for your purpose. Jasco has built a lot of devices that fit in this category. Some of the Brands they sell under are Enbrighten, GE, Honeywell.
Let us know if you have any more questions.
