I can't tell you the EXACT cutters...but I think I can seer you in he right direction. Those really remind me of a technique of cutting away parts of a lace press. Earlene's Cakes has a wonderful document that shows some examples. http://www.earlenescakes.com/LaceInstructions.html
Look at the bottom of the page for the examples of "elements in lace molds." If not exact, some of those roses are very very close!
Ooh! Awesome! I will check that out as an option