Can somebody help how to source direct user contact details?
I agree with @Gordon's skepticism. Discussing security measures with an unknown person is a violation of security protocols. Perhaps you can use the customer forums of any of these companies.
It's like someone asking me if or which alarm system I have for my house. I don't give that information to anyone.
Hi: First, who are you? I have been using AV etc. since 1989 and never have I been infected. I do NOT share any further information without knowing who I am dealing with. :) I have been involved in technology and security my whole career.