These are the key specs: 9.6V DC 200mA

That's what's needed to power the unit.

You can go with a unit that has more than 200mA, so units 1 and 3 (on the first stage) meet the current supply requirements.

However, none of them match the voltage. Likely the best one is your 3rd unit, on option 1. Most likely that will work. The slight additional voltage shouldn't make a difference.

Does the unit have ability to be powered by 9V battery? If so, then certainly the first unit would work as well.

It's o.k. that the power supplies can provide more current than your existing unit - the number shown is the current delivery capacity, but if the item being powered does not need that much current, it simply just does not use the available current.

Scott