This heavy-duty head will nicely handle short-tube refractors up to 120mm, and/or bigger binoculars. The head is ~6.2 inches tall, the top plate is ~3x3 inches, it weighs ~4.5 pounds and is made of very sturdy cast-aluminum.
This is the big Bogen Nr-3039 head. It has a quick-release plate that allows rapid attachment of the scope/binoculars, and is equipped with two horizontal levels (for 2-axis tip & tilt). These heads are ~$180+ new.
I am asking $95 ; buyer pays actual shipping (probably ~ $10 UPS ground).