Yes, your ServiceNow admin/developer should be able to do this.

Have them create a catalog item but don't publish it in your catalog, this is where you build all the workflow you want, then when the inbound email comes in, it will trigger/create the catalog item and the workflow will take it from there. There is no need to have the inbound action recreate all these records. All those are created and related by using a catalog item and workflow.