Is "Setubandha" by bhaskaraya available online in Sanskrit/ Hindi/ English. if not where can i get a book ?
Yes, the Sanskrit text is available.
I have found one book of Yogini Hridaya on Internet Archive which contains two commentaries on it: i) Dipika of Amritananda and ii) Setubandah of Bhaskara Raya.
You can read book online on can get it in pdf format.
You will find YoginiHridiya along with Dipika and Setubandha in Sanskrit: