Quantity mapping in NetSuite Connector

Hello,

We are using NetSuite Connector for sales orders from Amazon. We are currently not syncing any product data, but would like to map the quantity available. Unfortunately, we have some custom item/inventory setup in NetSuite and the item's quantity available is not stored on the Item record.

We are storing the total quantity available to sell on a custom record that we have defined as a child record of the Item record. If I create an ITEM saved search and pull data from the related record, the field name looks like this:

{custrecord_cry_item_name.custrecord_cry_item_avail_linked_qty}