Have you tried front squats? Zercher Squats? DB Squat Jumps?
Now, if you have fused disks or vertebrae or anything as serious as that, I understand. But if it "just hurts" there are other options out there.
Hell, even if it is something serious as that, have you tried backwards sled drags? Those things will MURDER your quads.
There is nothing "smart" about a 3rd attempt deadlift.