I tried printing this directly, but the interlocking mechanism wasn't fitting together properly.
While tinkering with the border, I decided to see how many pieces I could fit on the replicator's platform at once, to reduce the number of total prints required to make a border.
Here's the result:
Grab the .stl from thingiverse, here.
.3mm layer height
60 mm/s feed rate
no other support
120 degrees C for platform
225 degrees C for extruder