How to effectively manage affiliate links on multiple product pages?

I Sell Leathercraft Patterns and would like to put a Tools List with Affiliate Links connected to either each product page or a seperate page.

I do not want to edit 100 pages individually if I ever change things, and I would love to call different information into each page.

For instance.
I’d like a “general tools” list that I can call into every page, and then a “specific to this pattern” kind of tool list.

So I can go and alter that general tool list, and its affiliate links whenever I want, or seperately alter the specific to this pattern list.

It doesn’t need to be overly fancy and I feel like I shouldn’t need any extra apps for this o