First of all, I commend you for adopting! Have you taken her to the vet? If she is the kind of cat that is paralyzed by fear at the vet's office, chances are she'll do fine with any groomer. They will trim nails at the vet and might brush if you ask, but chances are they will charge you like 20 dollars for the nail trim. Ridiculous, but true in mine and others' experiences.

It may not be that your cat has issues but just simply hates to be brushed. It's something she's not used to and most kitties aren't terribly fond of having their bodies touched in ways they're not accustomed to. You might have to try to get her used to the brush slowly, like doing one stroke with the brush and then giving her some pets and/or a treat so she associates brushing with positive things. You could also try different types of brushes. The Zoom Groom, a cat-shaped rubber brush, is a popular choice for short-haired cats.

Unfortunately I don't have a groomer or know of any, but if you can find a groomer with a good reputation in general, you could try calling and describing what's going on with your cat and ask them if they are okay with taking that on. I think any groomer worth his or her salt should be able to handle an animal that doesn't like to be groomed--I would guess that (with cats at least) the majority of their furry clients aren't too thrilled about the whole thing.

Good luck!