With all due respect... Korea operates differently than other international adoption countries in respect to agencies. You MUST locate an agency that has been approved by one of the 4 Korean agencies to place a child in your state. The easiest place to locate this list (and gather more information on this) is
Adopting from Korea - US Adoption Agencies with Korean Child Placing Programs
The information given by Max'sMom is correct. You will need to contact the agencies listed for your state and ask them your question. If they tell you no, then ask them what your options would be... they may be able to point you in a different direction that you hadn't thought of before but would be perfect for your family. Feel free to post more questions here!