I made a simple one from lightweight upholstery fabric. Unfortunately, I can't show a picture and have to make another cause I almost burned down the whole house when I tossed the cover onto the (unwittingly) still plugged in mini-iron. I smelled smoke, but dismissed it until it became absolutely undeniable. Lucky I snatched up the ruined cover before it totally burst into flames. Good thing I used that fabric instead of something more readily flammable.
I have seen adorable covers in some blogs, but I did not want to spend a bunch of time on it, so I just measured the dimensions of the machine and whipped up one. It worked great until its untimely demise.