Hey @Dannydek1982 .
Thanks for reaching out.
I appreciate the context that you have shared as that is super helpful! Looking into this, you can create a collection within your online store and manually editing the SEO for the collection. Once you have the collection setup with your desired products, you can edit the SEO for the collection by navigating to the collection page within the Shopify admin and selecting Edit SEO. I took an image from my test store to show you the section I am referring to:
With that being said, once this collection is published it will be indexed by Google. You could possibly look into the third-party application LockSmith to limit the amount of customers that can buy specific products. Additionally, we have Shopify Experts that you can reach out to, if you are interested in hiring an individual to complete this for you.
Let me know what you think, I am looking forward to your response.