Quilters Rule carries a set of heart shapes but you have to buy the set. You can also check with any local glass place and ask them if they can cut you the shape out of 1/4"plexiglass. Most will but many ask you to make the template to cut.
https://quiltersrule.com/ProductThumbs.php?category=20
Edited to add they have a single heart in their bargain area
https://quiltersrule.com/individual-product.php?id=264&tier=retail&category=562
Last edited by feline fanatic; 08-10-2019 at 12:59 PM.