trust me there is no alternitive, its absalutely stunning in the flesh. I will probably end up cutting the steel behind the mesh so its not a circular hole but will be keeping the mesh instead of using plexi as everything is visible through it anyway after you throw in some ccfl 
you can't get the window panel in the uk as far as I can tell.
Did you manage to get it from NZXT? When I emailed them they said that I couldn't buy it in the UK.