Since this primarily involves customizing your NetSuite saved search to generate the desired output within an item search, support won’t have much more to offer. The record type in the IA cannot be changed from Item to another type. While the IA is designed to cover most customer use cases, it doesn’t address every scenario. This might be a great opportunity for you to build your own flow, and there are plenty of resources to guide you through the process. Additionally, sending inventory to Shopify is relatively straightforward, so getting started shouldn’t be too difficult.
If you decide to go this route, we offer office hours every Tuesday (link), and you can also seek help in the Integrator.io channel or explore training through the Celigo University.