Is there not yet a customer price per item update?
No, there is not.
Is there a solution for it? For example utilizing another software feature to be able to do it? or through some codes maybe?
No.
I don’t know how many products you have in your inventory. You may use inventory kits but you may end up with an interminable list of kits.
What would you like to set your price to for each item and customer?
If you can work out what you actually want, it maybe achievable.