re: Where can I find these letter cutters?

Prima Cakes and Cookies - Jennifer

This isn’t the same bubble letters but they are bubble letters
http://www.wilton.com/store/site/product.cfm?id=68AFECE2-475A-BAC0-531D133C262FECDB&fid=68AFED01-475A-BAC0-5CAFFB72FD8EC635

Jennifer, https://www.facebook.com/PrimaCakesandCookies