barefoot shoes?

 Hello everyone. I've recently gotten into the benefits of going barefoot without actually leaving the house shoeless. When I run, I wear stupid-looking vibram five fingers, and I've got a pair of Vivo Barefoots by Terra Plana that were too expensive. I'm sick of looking for new shoes that meet the specifications of being classified as "barefoot shoes" because they either way to expensive or just look stupid. The solution? Does anyone know anything about replacing the soles of shoes? I figured I could just take some shoes I've already got or get some new ones and replace the anatomically flawed soles with a sturdy but flexible sole about 3 or 4mm thick throughout. But I have absolutely no idea how this would be done.

this is an interesting ible