The unit would appear to be used not only as the suspension medium but also as is own damper.
This cannot have been a one off component. I could go along with it not being an automotive part. It is akin to an engine mount from a generator or some such. Either that or a vibration attenuator. As such it might be from a boat or a railway locomotive. It looks a bit heavy to be aeronautical. I know we discussed this before and some research was attempted. But equally those sorts of products might lead to a resource that can be used, or someone who can repair, or recreate, the part.
Historically moulding companies are not to keen on reusing steel containers but this looks a bit of complex thing to make. Also would it be made like most mounts, which are created under pressure in a mould? My dealings with such manufacturing has, at best, been about 5th hand.
A temporary solution might be to use an Imp/Lotus/Triumph Rotoflex unit. It would need an outer casing made to pick up on the body and three of the Rotaflex mounts. Two plates, some welding and bolts should achieve that. A standard spider on the other three Rotaflex mounts in the middle would have to be modified to fit the rod in the centre. A Rotaflex certainly has the torsion rigidity in two directions, so I assume it will have in the third. It might prove a but hard and it might shear as the force is mainly being applied at 90 degrees to the designed loading. They pretty tough. I do not think the Isetta version would be big or tough enough. Rotaflex units are easy obtainable second hand to see if the idea will work. Spiders are not normally desirable as they do not fail.
