How can I download the bed files for Agilent SureSelect XT Human All Exon v3 exome capture kit?

Hello,

I am performing analysis on an old exome datasets. I need the  exome capture kit bed file for the same. Where can I download the bed file for  Agilent SureSelect XT Human All Exon v3?

Thanks,

Surajit Bhattacharya