I had a hard time finding a cutter that looks just like the one on the cake but I did find these:
http://www.sugardelites.com/Bride-and-Groom-Forever-One_p_2220.html
http://www.sugardelites.com/Bride-and-Groom-Cutter_p_1712.html
Your best bet would be to use a cricut cutter or when all else fails just hand cut it using a very sharp exacto knife
