Virtual 3 Way

I am looking to set up a virtual 3 way switch(s). In all the posts I have read the Linear WS15Z-1 and WT00Z-1 switches are the way to do this, however they seem to be short in supply. Do you know where these switches can be purchased or is the a comparable combo that will work? Thank you

Looks like a handful of available vendors with a search.

2GIG is the odd-man out in that the panel Z-wave compatibility is not necessarily going to match ADC, but ADC now supports Eaton 3way switches as well. These also work as virtual 3-way switches. Switches will also generally just be compatible given their simplicity. (Avoid Cooper Aspire RF)