Thank you for the generous offer Erik. If you've seen the photo I posted of my existing shoe you can tell that function rules & form is totally optional, so I wouldn't be picky about color. Based on Jeff's reply I revisited the Kent shoe design & think it's time I got around to building one of my own for the PRT. So I'm going to hold off on 3D printing one of these for now.
Cheers, Daren