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If we're talking about a licensed version of the game, you can simply open almost any free-play scenario and find both upgrades there.
If we're talking about modifying campaigns, that's a completely different question.
There's no need to modify the campaign. :)
You still haven't specified exactly on which maps this happens, whether it's in the campaigns, whether the game is licensed, whether it happens on all maps, etc.
Because of this, it's impossible to help you. :)