40mm x 40mm end plate

I am looking for a 3d printable file of the 40mm x 40mm v-slot extrusion. I would like to have a plate with the 4 holes aligned so i could use the self tapping screws to secure it to the end of the extrusion. I am also needing a center hole so i can put a 3/8 inch all thread through it. The goal here is to have a plate i can mount and have feet that i can adjust the levelness of the build.

Does this makes since? let me know and i could send a link to the MK part number i am looking at.