Thay have 031 and 072 turnouts and 60 and 90 deg crossings. I don't see 042 switches in the K line track library. It has 036 switches in the Super O library, if that fits in anywhere in all this? Those are the only libraries I have that come close to matching K Line or super snap in their names.
But, I am not sure I have all their track libraries, there may be more that I don't have which could contain the things you are looking for? I am pretty sure they list the track pieces included in the libraries somewhere on their website.