Filtering Sync in vCRM and Inventory Integration

I have a vertical CRM with Inventory Integration. In inventory, there is all the products my clients purchase, including items they don't resell.

In the vCRM whenever they create a Quote and add a product, ALL the items in zInventory show up on the list of things to choose from. This is ALOT of stuff and the list is growing.

Is there a way to only bring into the CRM items created in Inventory that are for resell? Or change the sync to one-way so nothing created in inventory comes in? They would rather have nothing than everything, and just create the resellable items in vCRM.

I tried to change it back to one way sync (vCRM to Inventory), but it said I couldn't because it was integrated with zoho books: Cannot change 'Extent of sync' from two way when Zoho Books module are enabled in Zoho CRM

Is this possible?