Michelle--
I would think that as a simple act of kindness your LQS would cut your fabric into smaller pieces for you when you purchase it, as long as they are not too busy.
Why don't you go into the shop and talk to the owner and explain to her the reason for your request. The worst they can say is "no" and they just might say "yes". :D
If I lived near you, I would be happy to cut fabric for you. (and I have arthritis in my hands.)