Here are some that are free. I have gotten a free Grand mono number set from them also, and a plain and loop FSL number set from them.
Have also gotten one from Sewweird in the past.
Here is what I could find for you for applique numbers:
http://www.starbirdstockdesigns.c...
In designs by cuties Meganne posted a complete alpha and numbers series of applique designs.
#6 link - I know the college applique font has numbers. I'm not sure which of the other Embroidery RN fonts have numbers. But they are free so it won't hurt to download and look.