Well I've finally go my overhead done (well the panels anyway). I decided to make my own panels using Acrylic plexiglass and labels printed on my inkjet. This method is certainly not new and has been suggested/documented before but I never really could get a satisfactory result. I ended up using A4 size self adhesive printing label paper. One for a top layer and another as a black mask underneath. Simple, easy and cheap! And I'm very pleased with the backlighting ability, although the panel edges still need sealing. It was so easy I uploaded another tutorial for others wishing to go this road.
Here are some pix of the progress and completion.
Ken.