I'm not sure if you found it or not but just in case.
Here is one specifically for an embroidery machine. It is the one I am planning to make for my 4500d.
http://www.zimbio.com/Sewing/article...ozy+Cozy+Queen
I have a slew of tutorial links for machine covers on my website so if this one doesn't grab your eye, maybe one of the others will?