Seems like a good idea to find someone with a CNC to cut the brick/stone pattern pieces.
If you stick to a multiple of 3/4" for the pattern, it will be easier to manually cut/file/blend the patterns into the edges of the front piece.
For the pipes, use a belt sander/sanding block to remove the lettering on a PVC drain cap and put it on the corresponding size pipe.

Use a hole saw to cut the piece the pipes run through and mount a matching second piece on the base to keep the pipes aligned.

Scott