If this is specific to one catalog item alone, You should add the notification in your workflow. See screenshot below

Your workflow should be on requested item table, The first two lines gives you access to fields on requested item. Similarly you can access all other fields in it

Number: ${number}

Item: ${cat_item}

If you want to display catalog variables in your mail, Access them with this syntax   ${variables.variable_name}

State : ${variables.state}

Country: ${variables.country}

Thanks

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