I know 4 approved evaluation services:

CPEES

www.cpees.org

P.O. Box 720010

Miami, FL 33172

800-464-7650

AACRAO

www.aacrao.org

1 Dupont Cr., NS, S. 520

Washington, DC 20036

202-293-9191

FCSA

www.fcsa.biz

1910 Justin Lane

Austin, TX 78757

512-459-8428

SpanTran

www.spantran-edu.com

7211 Regency Blvd., S. 205

Houston, TX 77036

713-266-8805

I did mine from AACRAO, washington DC, one good thing bout AACRAO is photocopy of your transcripts are what they want. Unlike some others who ask for sealed transcripts. Bad thing is they are real slow in processing. 

Good luck