We have done that for many winters.
Forget the springs, or the rubbers, or any patent solution.
There should be sets of lines going to the bollards ashore.
They should all be Nylon.
The splices should all be shoreside (so that you can cast off and leave in a hurry)
You should have a 1/2" four as the tightest set.
These should go direct ashore from the outboard
cleats, and across each other on the inner cleats, or "v" to a center bollard if you have two slips.
A 3/4" four, and hanging about 30-40 cm below the previous four, also straight and crossed.
A 1" or larger pair last, hanging 30-40cm below the previous, but not crossed.
Adjust them carefully, and the thickest lines should only take strain on the most violent surges.
If your front lines, going to the main-chain are also Nylon you might land up boinging around like a toy. We prefer a chain pulled tight there, where weight is less springy than a Nylon line.
Never tried this but, would you be able to point your rudders in opposite directions? This could arrest surge quite well.
We also always fender
off to adjacent boats really well and tie off to them too. You want to surge together, and not have relative motion. We spring and tie to both sides, and the whole dock
should be snugly tied to each other....if a storm rolls through, and the boats are surging contrarily, huge damage can occur in a short time....