Rossi/Look/ make Pivots right now but they will set you back some cash. The PX 12's are good binders though not ultra light (still lighter than full matal) but durable, very reliable and lot cheaper.
You think the Griffons are heavy? are you out of your mind? They are so light. If you think those are heavy try riding with a pair of Pivots on your skis. And the Griffons are barely better than their comp series bindings. they are all plastic and fall apart after a couple months of riding. I
To the OP- If you do go with Marker, spend the extra cash and by the Jesters instead of the Griffons, they stay together a little bit better. But really look into an old or new pair of Pivots/FKS. They may be heavy but by far the safest and most durable binding out there.