As I needed a pair of cleats ASAP, I had created Look Keo Cleats remixed from a keo cleat spacer found on Thingiverse to help with shape (https://www.thingiverse.com/thing:2214318). I've printed it with a 100% and so far has held up several indoor and outdoor rides. To make it grippy while walking, I added some hot glue to the bottom. If you print this out, please let me know of any feedback that can help me with his.

UPDATE 21SEP2018
Had a friend of mine print this in PLA with 100% infill, but it broke in 3 weeks of almost daily rides indoors (on Zwift) and outdoors (fast group rides & crit training). So this is perfect if you need one ASAP. I do think it might be best to print this out in ABS. However, I don't have access to ABS. If you have access to print in ABS, please let me know if it works better for you.

UPDATE 23MAR2019
Finally got the chance to update the design. The holes for the washers were too small and needed to be 1mm larger. Also, added 1mm to the bottom of the model and made it where I could make it TPU for some grip.

UPDATE 21FEB2020
Uploaded Rev 4.1
Fixed a section that had a small gap in the cleat that could possibly make it a little weaker than it should be (back left part of the cleat; see pic).