Varivasya Rahasya is available on archive.org. English translation by Pandit S Subrahmanya Sastri.
It can be downloaded in different formats with pdf included.
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:
Sri Vidya is essentially about worshipping the Supreme Goddess or Sri Lalita Mahatripura Sundari. But, several other deities are also worshipped in the traditions as limbs of the main worship. There is something called Krama or succession of worship.
One of the important scripture about Sri Vidya is Parasurama Kalpa Sutra. The book Nityotsava elucidates it, ...