Last year there was talk of having custom Wacky binders custom made by Zazzle. In the past, Scot was able to get Wacky binders made, but more recently he reported they had cracked down and refused to do it. Vahsurfer also got declined by Zazzle when ordering a binder with Wacky images.
Don't let that stop you. Go for it! It's worth a try!
If I was going to try to slip something Wacky by a custom manufacturer, I'd probably try a black and white image such as one of these.
It might fly under the radar.