Save (Low) Inventory for Subscribe & Save?

I’m an Amazon private label seller (using FBA) for 5 years. We launched three new products this year. One of our new products is low on inventory and the next production run is going to be delayed. We are going to run out before we can restock.

We would like to save as much inventory for the low number of subscribe & save customers we have already. We are willing to even deactivate our listing for new customers in the meantime. Does anyone know if this is possible? Amazon seller support hasn’t been any help. Thanks