You are approaching this the wrong way. That is a question the COMPANY should be asking, your question is much simpler, and doesn't depend on anybody else: how much do you need to be paid for doing this job?
Anything less than that is by definition, unacceptable, anything over should be acceptable. Now, what you need should be influenced, but not determined, by how much you can make elsewhere.
In short, you don't need to look up an equivalent title or even equivalent job, you need to look at the requirements of the job and how much you think you can make elsewhere. What does the job require that you would be reluctant to give? Hours, availability, stress, travel, location? What does the job offer that you want? Hours, travel, location, responsibility, power, career growth?
Do you want the job and what it offers more than another job (say your current) and what it offers?
Final note: the company needs to determine what is an acceptable market price, but they should be doing so based upon availability of people with the required ability who desire to do the job, not job title. If they don't they are unlikely to hire a good fit, but that is their problem not yours.