Aren't there rubber chassis pads behind jacking points?
On my '84 Benz there are rubber padded areas built into the chassis behind the jacking points on the car for use by garage four point hoists. Why don't you use these points for your jack stands using a piece of wood to cushion the end pieces of your stands as they take on the weight?
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan