This model was originally made by a FRC team mentor by the name, “Aviv” on ChiefDelphi
(ChiefDelphi Post Here)

They share a Thingiverse Link however, it has been 404'd and unavailable since.

Aviv also shared the model here on Printables under a different name.

I am re-uploading this model (.step and .stl) as a form of preservation.
I take no credit for the models, pictures, or any other Creative Commons or Copyright material. All owners and original designers have been sufficiently credited.

Creative Commons below is the same as Aviv's original post.

The .gif in the photos reel is from /u/NyanWolf102 posted to /r/functionalprint and cross-posted to /r/frc (Post Found Here) the other photos are from the current Printable's version and from the original ChiefDelphi post.

I am selling these in packs of 30 with free shipping on Etsy for $10 in the spirit of FRC for teams who may not have the ability to print their own.
Link: https://www.etsy.com/listing/1663554042/30-pack-05-in-clip-on-spacers-for-hex