Attribute Stock

First thanks all for any help.
So Im looking for a way to manage stock for products based on attribute values. In our case we use lengths of carbon and colors of ends attached to it. These are spread out over many options and assembled as ordered. We can not use variable product inventory because they are not pre assembled. So right now they select length of carbon and color of end. I want to reduce stock of each attribute not variation as that would not work. Not sure if my deliverable is clear or not but any help would be appreciated.

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