I don't expect you'll like this answer but I think the truth is that you just have to do this yourself, from your own knowledge of the business, or find somebody knowledgeable to do it with you. The reason for that is that every business is unique, so it is just hard to imagine that somebody would have thought to give you a list that does this for your business, and then had the generosity or economic interest to make it available for you.
What you can get are examples, to spur your thinking, but when none of 500+ sample plans we have available is helpful -- all of them in fact were financed, one way or another, either loan or investment, so they can't be that bad -- then I just have to think you're not going to be happy with anything else available. I can't imagine that the SBA library is going to have any kind of a list of your detailed costs for your specific business.
On the more positive side, you've been operating for a year, and it sounds like you have a good grasp of the business you're in. Do you really need to find some external source to validate your own estimates? Don't you have the knowledge it takes to think this problem through and estimate the numbers yourself? If not, don't you have an administrative person who does? Or existing accounting results for the first year, that list your expenses?
This is the kind of business-specific information that people generally develop themselves, for their own businesses, after looking at the kind of examples you've already seen.
And finally I apologize for not having a more attractive answer, but I think I'm more useful to you with what I think is the truth.
Best of luck,