Add prefix to configuration specific property

I'm looking to add a prefix, such as "1-", to all of a certain configuration specific properties named "ItemNumber".
However, I've not been able to find a method using Dispatch to add this prefix in the manner I want.

For example:

Part1

                     Old                        New

Config     ItemNumber          ItemNumber

00               123456                1-123456

01               123457                1-123457

02               123458                1-123458

Is this even possible with Dispatch without knowing the configuration names in advance?

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