I want to add a complementary product to all products on Shopify

I want to offer an additional product on the product page when customers click on a product. For example, my website sells pillow covers. When a customer visits a pillow cover’s product page, I want a matching pillow insert to be displayed on that page. The customer should be able to select the quantity of this additional product and add it to their order with a single click.

Additionally, I would like the recommended pillow insert to match the size of the pillow cover selected by the customer. For instance, if they choose a 45x45, 30x50, or 50x50 pillow cover, the appropriate size pillow insert should be suggested.

Website: https://cushionnook.com

If there is a ready-made Shopify app that can fulfill these requirements, it would be acceptable for me to install it. Meeting these requirements is sufficient for me.

I am requesting proposals from anyone who can do this. My budget is very limited, so please consider this when making your offer.

Best regards,