Did you sign up for the Seventh Generation Good Community when they offered free samples a while ago?  They have more samples, even if you received one already.  New and existing members can complete a survey to see if they are eligible for more samples.

They are choosing 15,000 members to receive samples so you have a decent chance at being chosen.  Make sure that you have an up to date shipping address listed with them (click on your profile image to get to check your address) as they do not ask during the survey.

If you are not a Community Good member, it is free to sign up and this is the third time they have offered freebies this year.