I found the original post on the QB that caught my attention:
http://www.quiltingboard.com/links-r...g-t250048.html
Check the edit to my post above, where I give the website for that setup.
Edit: The QB thread shows alternative homemade setups too. If you Google Leah Day, I believe she made her own suspender setup. For me, I know I would need to buy it; have too many unfinished projects around the house!