The only reliable way to produce .dsf files would be to use DAZ Studio, which is actually the native program for that particular file type. It also supports import of Collada 3D assets (.dae), so obvious candidate for dae to dsf conversion. Without DAZ Studio, it will be pretty or even impossible to find a program capable of this conversion.
Convert Collada 3D digital asset exchange data to DAZ Studio DSF file format 3D file.
We found 2 software records in the database related to .dae to .dsf file format conversion.
Microsoft Windows software - convert dae to dsf on Windows
A 3D animation software
Convert from dae file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned dae to dsf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert dae to dsf on OS X
A Mac version of the popular modeling tool