Phantom item issue, help needed with setup

Hello,

we are currently facing an issue that we have two goods which are exactly the same, apart from one component. These are marked as item number X and Y

We want to integrate this into our system with one item numer Z with the option for the puchaser to choose which of the Z item they like.

For example, this is the setup we are looking for;

Customer has two item numbers X and Y. This is inserted as a purchase request, we then want the SAP System to assign this as item Z (component Y) or Z (component X).

We want to have this setup so we have to maintain one item record while still keeping two items which are slightly different in the component setup. We are trying to avoid keeping two item numbers in stock

Is there a way to have this setup?

Thanks in advance!