I've been looking at this one (scroll down)
http://www.pmdx.com/ for mounting my four G203V drives. The PMDX-132 model.
If any of you here are familiar with it I need any honest good or bad recommendations of it or the company before ordering it. Send a CNC Zone pm if you wish. I haven't seen any mention of it so far but I don't read all of the forums and have not done any searches yet.
I don't need it to be mounted in a cover so that's not a problem for me. I need a breakout board and this looks like a convenient solution that is similar to the G540.
CarveOne