Looking for an FBM Inventory Alert

I am looking for an inventory alert app for FBM, we have a large catalog with many variations. We set the inventory to a low limit as to not oversell but are now running out of stock on too many items on a regular basis. I want someting that will alert me when a item get to a certain level so I can update the inventory before running out. I tried something called Argo Apps but it is not a functioning product.

Any suggestions? really don't need a forecaster jut the inventory. I know FBA has an alert but not FBM