Thank you everyone for the great advice. DH is going to call today. So, crossing fingers that MM might have the part.
garkarlon- That is a good question. I don't know how many grams of pressure the Slice does. I am guessing around 200. The Wishblade/Craft Robo/Silhouette are around 280 Grams per pressure and it can't cut balsa wood.
I have a BossKut Gazelle at 500 grams per pressure and it can cut balsa wood.
Does that help any?