This is a modification of the vive controller mount from SG-O (https://www.thingiverse.com/thing:1443154). Make sure you go there to get the Base AddIn part you want to use.

I modified it so that it would fit on the print bed of the replicator 2. Also, added some holes on the bottom to insert 12mm x 6mm magnets. The 14mm holes have room for epoxy around the magnets on the sides and over the top (they are 8mm deep).

Wanted to share in case it might help someone else.