Re: There is, under the current system of legislation, few

There is, under the current system of legislation, few recourses for those who feel that their career opportunities have been unfairly curtailed due to inequities in early educational systems.

There is, under the current system of legislation, few recourses
Wrong. "few resources" ==> plural ==> "there is" is wrong.

There is, under the current system of legislation, fewer recourses
Wrong.
(1) "resources" ==> plural ==> "there is" is wrong.
(2) Fewer is a comparative form ==> But we don't see any comparison [fewer + than]

There are, under the current system of legislation, few recourses
Correct.

There are, under the current system of legislation, fewer recourses
Wrong. Fewer is a comparative form ==> But we don't see any comparison [fewer + than]

There are, under the current system of legislation, few recourse
Wrong. "There are" + "resource" is wrong grammar. Should be "resources"

Hope it helps.