If you look online for things like natural parenting, cloth diaperings, organic clothing for baby, things that you know are eco-friendly they will often sponsor links to other companies that meet the same criteria.
You might have some success using your telephone book yellow pages as it would be posted in the ads if they sell eco-friendly products. Look under toys, baby equipement, parenting, etc.
Local agencies such as the leleche league or even drop in mom and tot groups would be good places to ask around and gather information.
And please share links if you find them - momof4 does your brother have a website or a price list or something to share - where are you again.