The expression is "get hold of", not, "get A hold of". Although I have a suspicion that American's may use the latter form. I would only use it in a sentence like ' get a hold of yourself and stop panicking'.

In this case, the word "contact" is better. She askes me if there was anyone she could contact for dealing... Get a hold of is when you already know who you want to talk to, and you're trying to talk to them. Like, I tried to get a hold of you yesterday, but you didn't answer the phone.