Recommendations for daycare for autistic son

I'm a Bryn Mawr mom looking for daycare recommendations in the Area for my son with Aspergers. He's been attending a center in Ardmore for two years and overall we've been pleased. However, more recently my son has been having some behavioral/social issues and the  teachers are now not adequately trained to properly support him. Plus the class size recently went from 18 to 31 children, which has been problematic for my son. If any parent can recommend another center that is known for great support of special needs children please let me know. Thank you!