I don't think there is anyway around this unfortunately. If Meraki support have told you already that their isn't an NFO (Network Feature Override) that they can apply to help overcome this I'd say that this feature is not yet available/supported.
My recommendation would be to follow up the feature request with your SE/Sales rep they'll be able to work with you on this specific feature request as well as getting directly in touch with the Product managers themselves.
Eliot F | Simplifying IT with Cloud Solutions
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