For prototyping a large embedded system I am looking for a card rack with a good backplane. 20 or more slots, 64 or 96 pin DIN connector or similar, single height, maybe Eurocard-size. Preferably not Press-Fit but we can always hand solder, of course. Most of what's available is VME with super-wide power and ground traces but as far as I could make out from the data sheets no full ground plane. We've got analog stuff on most of the cards so a ground plane is important. The bottom (solder-side) layer should be traces so we can cut some for slot ID and analog stuff, can't use 100% internally bussed versions.
Short of laying out our own (again...), is there something with a ground plane that can be had off-the-shelf?