Like so many others posted, LQS needs to cater to the many, not the few. Really all you need for handquilting is quilting betweens and thread. You don't even need a thimble, I only use one part of the time. In fact there are a lot of us here on the QB that are "fingernail" quilters. We push the needle through with our fingernail.
I think anything else is just a gadget and the job can be done without. Which is why LQS would really only carry the essentials for hand quilting. Needles, plain vanilla thimbles and thread. Every once in a while you will find a LQS that carries really nice thimbles or gadgets. This is why we have the net. Quilt shows are sometimes good venues for out of the ordinary supplies. That is where I found my uber-expensive TJ Lane thimble, which is the only thimble I have ever been able to train myself to use (some of the time!)