Thank you for re-posting. I hope you will get some answers. I would look into FSL designs. Corner ones would be perfect or flowers. I tried to upload a picture but can not do it right now.

hej, I remember I think it was a brasilien site which had lots of flower designs and one very nice shoe triangle in lace. something with paz or pax in the name but I can not recall the correct name. perhaps some organized cute remenbers. hope you find what you are looking for.

Pax is the name I have saved the designs into (years ago) and I have the FSL triangle as well as other designs. I have googled Pax Bordado and didn't find their website. They were associated with an industrial embroidery machines called Happy. This Happy website is still there but didn't find the Pax designs. They have a blog with a few designs but nothing to do with Pax (I think). Since the Pax design is shaped as a triangle, you could use any other FSL triangle that you like from another designer.
Hugs, Lidia

HI, I've found numerous sites offering barefoot sandals - no sole. They'd be great for a wedding at a beach. Perhaps you could make these work for your purpose.

I've included a tutorial by Urban Threads that show how to re-purpose designs to make a barefoot sandal.

I found it. http://www.pax.com.br/_pax2010/bor_brin/l103/l103.php

These:
https://www.soniashowalterdesigns.com/free-standing-lace/barefoot-sandals-more/

Did you find what you were looking for?