These tech support websites seem to be very scarce in the wild (at least with my experience) and I find myself unable to find any websites with working phone numbers on them. What's the trick in finding these sites?
Visiting typo domains is one way to get them.
You can also check out mywot.com and see user ratings, sometimes there'll be fake sites getting rated. There's also a forum post for scams.
You can also search through lists of newly registered domains for certain keywords, like "windows", "apple", "support", "virus", "error", "warning" etc.
yootube.com fecebook.com facebiik.com googol.com youtobe.com and anything else you can think of, these are what i use
yootube.com fecebook.com facebiik.com googol.com youtobe.com