Looking For Bustle Styles

I need help determining the style of bustle to apply to my dress. When my dress arrived at the bridal shop, it fit perfectly. It needed no alterations! I was very pleased about this bc I assumed it would mean I would be able to save on my alteration costs. So we proceeded to pin a gorgeous bustle. As I was walking out the door I asked the price of the bustle. The seamstress quoted $120!! After doing my research, I realize that is incredibly overpriced. And I believe they are trying to make up for the money they lost on me not needing any alterations. Unfortunately it is the only "bridal" shop in town. I have called other seamstresses, and they are all familiar with bustling, but most recommend bringing in a picture or having an idea of a style that I would want.

My dress is a sheath (form fitting) and I am petite. What style bustle should I go for?

Thanks,
Aya