Hello,
You would just need to contact the manufacturer of this product in order to get a replacement. The manufacturer is Dimensions and here is their contact information:
https://www.simplicity.com/contactus
Monday to Friday
8:00 AM to 4:30 PM CT
1-(800)-794-5866
Just let them know what product of theirs you have and what you need for it and they will take care of it for you :) Thank you!
~Kristi @ ECS