Hi Lacy's Mom. The disc is called a SnuggleSafe. They have a website that is based in the uk. it is
www.snugglesafe.co.uk. at the bottom of the website is an email address.. i emailed them and they sent me the info for their US based company (it was a while ago so i don't have the address anymore) i emailed them and they send me the replacement disc, so i imagine you can also purchase them this way. The disc, if i remember was around 20-25 dollars Canadian. Let me know if i can provide anymore info. Good luck.. they are a lifesaver!