Hi Charity. Congrats on getting so far in your homeschooling. So many give up after the grammar school grades.
I've not used the Alpha Omega Lifepacs but I would think you could go to their web page and contact them about getting only the specific answer key you need, that is if you have the current edition. You say the organization you're going thru is unable to provide what you need at this time but you're unsure why. I would suggest, also, probably first, that you contact them again and find out why. Are there no other families at this level using A&O in your group?