Hi, this is covered in our FAQ section. Unfortunately, no, you need a few normal BAMs from the same capture kit for coverage normalization. There are tools like CNVkit that work reasonably well without, but not good enough for allele specific copy number inference. If this is a commercial capture kit, then you might be able to find some in the public domain or from the vendor. But yes, like Kevin said, this is usually protected data.

What I have done in the past is to use CNVkit to find tumors without major copy number events and then used these as normals. But this only works in some cancer types.

And of course, adjacent normals work too (for the unlikely case you have those but not blood).