The springs are from a V6. I'm not sure if these would be suitable for a twinnie or not.
As Desame says the regulators are non auto drop. An auto drop car will have auto drop regulators on both sides of the car.
If you are after a regulator to replace an auto drop one on you car then it should be possible to make one of these work if you are prepared to swap one of the arms over (super easy) and drill the rivets from the switch bracket on the original auto drop regulator and attach it to this one. Check out PKR's guide if you want more details. It will be a bit of faff, but a cheaper than buying an auto drop regulator.
Hope that makes sense!