Document SOP's or Resolution Steps

I have a small installation of Zendesk which is supporting internal users only. We are a 1-2 man operation so I don't want to over engineer anything right off the bat.

We are supporting 20+ products/processes and each one has a different SOP that we've worked with the owners to create. It's all being managed via a separate document and I would like to place those internal to ur Zendesk instance to make it easier for our agent/s.

I don't want to build out decision tree's right now - we aren't at that level of complexity. But I do want there to be a panel where an agent can 'look up' that SOP to find the right answer. 

Is there a good integration that can handle this? Beyond building out internal knowledge base. I do not plan for our ticket submitters to search for answers themselves. We have an intranet for that and they are coming to us regardless.