Istio operator template - allow for changing labels for extra gateways

Currently, labels are hardcoded for extra gateways in the istio operator template which prevents us from deploying a completely decoupled second gateway deployment to separate our ingress traffic (for example to load balance bigbang tools traffic through internal ELB and application traffic through public separate ELB both managed by istio). Would it be possible to expand extraIngressGateways portion of operator template to allow for this use case?

Thanks!