I would make a page such as:
www.atafa.com/sports-sweatband/
Dont register a new domain, it will take too long to get listed plus you chance the dreaded sanbox, plus since your site is already established and has authority adding the page should be indexed rather quickly.
Then make that page just about the sweatbands, in your title description and content. Also including a link to that page from ALL of your sites internal pages as well as the homepage would do the trick.
IMO