you are looking for the proverbial "needle in a haystack", I don't think you will find any toggle style Z-wave switches.
You have 3 choices:
change out all of the switches to Decora style (white or beige, white is what most of the Z-wave switches come in so keep that in mind), switch plates as well.
change out only the switches you are converting to Z-wave, you will have to buy mix and match switch plates (Home Depot sells "sections" that fit together to make up whatever kind of switch plate you need)
Do nothing (no Z-wave at all)
Those are about your only choices, and what everyone here has done. I myself only changeout switches that get used, ones for outdoor lights that are on "dusk to dawn" sensors I didn't even bother changing out, and those are also CFL fixtures as well, not much power used on them.