You can download a vcard of the person if they have it enabled in their profile. If they do not then you will not. Just for giggles mine is enabled.
So to get it you will need to either click on my name in this thread and then click on view Public Profile. That will take you to a page that has information about me. You can from there see under my avatar that there is a link called Download vCard
Click that and download it. It should download as a vcd file. From there you will do with it what you want.