bilbatex uses a different style format (
.lbx) than BibTeX (
.bst). As such you cannot use
.bst files together with
As far as I'm aware there is no "converter" for
.cbx, and it is very unlikely that someone will actually create such a converter.
As a general rule: If you have to use a certain
.bst file (because you institution requires you to do so, your publisher insists on a certain template etc.) it is best to go with BibTeX and the exact setup recommended in the guidelines.
If you just happen to like a particular
.bst file, you can check first if someone has created a
biblatex style for it (a list of styles can be found here), if that is not the case, you can try and create the style yourself.
To implement a bibliography style yourself, first choose an appropriate basis for your style, find the standard
biblatex style that comes closest to your intended style.
According to this, that would probably
numeric in your case.
Then you go on to modify the style to your needs.