I have included 2 files for the Face plate. the one named AnetFaceplate.stl has fillets that caused issues when i sliced it. I assume there is an easy fix, so i left the file for others to play with.
The other File (Fixed_AnetFaceplate_no_fillets.stl) is slicing and printing with out any issues.
I used the STL files from www.thingiverse.com/thing:1585924 and designed around them. I used Fusion 360, and Craftware to slice it.