OK, I made my own Big Conversation hearts.
You can access the files through Google Documents at the following links:
I printed and cut out the hearts, traced them onto 2x6" wood, then used my band saw to cut wooden hearts out. I sanded the wood a little, then painted the hearts in colors to match the printables. Modge Podge the printables to the fronts, let dry, then apply a top coat. You can sand the edges if you want.
Enjoy the free project!!! And be sure to thank Heather for requesting the files so sweetly :0)
p.s. the hearts are actually all the same size. Don't let the pictures above fool you.