I have gone through your requirements and understood that you are looking out to fetch the data from all the listed three websites to your current Magento website. I can immediately start your work.
Relevant Skills and Experience
I have 7+ years in web designing & development with good experience in following skills:-
1) PHP, ASP.net, C#, YII, Cakephp, Codeigniter
2) CMS - Wordpress, Magento, OpenCart, PrestaShop, Drupal
Proposed Milestones
$200 USD - cost