AThey are made by CK. I think you can get them from global sugar art. You brush lustre dust into them, pack in your fondant/gumpaste, remove any rough edges with your fingers, remove from mold and glue to the cake with water. You can cut the molded pieces of fondant with a knife to create smaller appliques too. Its quite time consuming but its a great look.
AI saw these today on Etsy! They are on a site there called BellaCakesCT...it is under the title Lace Mold Flower Silicone, 2pieces, 41/2"x2" and it is $10.00. I
This one isn't exact, but it's very close. You can trim parts off to make different looking pieces, it's just a bit time consuming.
Thank you!! Appreciate it :) I'll find them on GSA and the Amazon link helps too!!