Sulky has a free clover, appliqué, it is not the size you want I am sorry to say, but very nice.
Thanks for the ideas Shirley-I will try the SWAK one out. The emb library one won't work, 'cause I need the tail "hooked" to the design
try Swak Embroidery
the shamrock is about the right size if you don't stitch the I & U or you delete them in your software - it should work.
Try Embroidery Library
I'm answering my own question. I need it a little bigger...sorry! I found one on the SICK site, but it was too small.