I need suggestions and information about my Private Student Loan?

This is in regards to a Private Student Loan I took out. I had a co-signer and now my co-signer wants her name removed from the loan. This is giving me rest less night because everyday she bugs me about this. Does anyone know of a legit Student Loan Company I maybe able to Consolidate my Private Student Loan with? I took out the loan from Salliemae and at this time they are no longer consolidating Private Student Loans.