I tried google search but I found nothing about mathas in pashupata shaivism. I am interested in becoming a ordained monk in hinduism sub-school pashupata shaivism. I would like to know where those mathas are located and if they have their own websites.
Yes there is the main place in Gujarat. Some people are in Karnataka also.
Kayavarohan is a village in the Vadodara district of the state of Gujarat, India. Kayavarohan is popularly known as Karvan and is situated on the National Highway 8 at a distance of 30 km from Vadodara. Kayavarohan is considered as the birthplace of Lakulisha
You can refer to this website for more details. From there the address is -
SHREE KAYAVAROHANA SEVA SAMAJ
Kayavarohan-391 220,Dist.Vadodara Gujarat-India.