try NCBI at (https://www.ncbi.nlm.nih.gov/dbvar/) or at EBI (http://www.ebi.ac.uk/dgva) to search for CNV. UCSC browser and tables are also good ways to analyse such data (http://genome-euro.ucsc.edu/cgi-bin/hgTracks?db=hg19&lastVirtModeType=default&lastVirtModeExtraState=&virtModeType=default&virtMode=0&nonVirtPosition=&position=chr11%3A2167853%2D2182439&hgsid=224347094_qpTaw7ptmuP5UWAKuDRRawI5jAH4).
I have interested in this topic, the CNV detection can be looked as a change-point issue. then we settle the problem with statistical methods. I hope the furthur communciation with you about this question.