Where can I purchase a bindle rotor for my smudge pump? That's on a par with the nature of your question.
Seriously though, I presume you're looking for parts for Total Gym, since lots of people seem to have gravitated to these forums for questions about the Total Gym products. If it is, ever consider looking at
www.totalgym.com
If it's not for the total gym, then look up for your make of exercise equipment on Google, or look on ebay or the like.
