Hi Thank you for your comment.
Just want confirm what you meant and explain in more detail.
Main Item has 2 optional component accessories
Main Item
Accessory 1
Accessory 2
Customers can purchase the Main item by itself or with 1 or 2 accessories.
The problem we have is if Accessory 1 or 2 is out of stock a customer cannot but the Main Item. This seem wrong.