Those are cute! I searched for heels with ribbons and found items close but not close enough. I looked on Amazon most were very um...stripperish. Where did you find the pictures, maybe that could help.
I was looking on http://bios.magnificentbliss.com/best/ at some of the bios and one of the brides had them on. I tried to find an email address for her or something but it wasn''t listed.
I wonder if she took the strap off of a pair of heels and added the ribbon herself? If you can''t find the exact shoes, you might be able to have a cobbler do that for you.