It may be difficult to get contact information from LinkedIn without sending a connect request first. LinkedIn’s default privacy settings make this information available to 1st and 2nd-level connections only. Only 10% of LinkedIn users have set their contact information to “Visible to anyone”.  To get their contact information, you may try to leverage an existing connection and ask for an introduction. You can also try an email permutator, search for their email elsewhere, or simply - send the request to connect!