I visited the premises in Boudha in person. Its not just next to the stupa like many shops but a little way away and easy to find with Googlemaps - just ask locals when you get there as they didn't have an obvious sign, at least when I visited. They have modern studios, workshops and a salesroom all in the same buildng. Bipin was very helpful and I examined several bhavacakra thankas before settling for a beautifully detailed one. The brocade was added in a day or two and the final thanka was delivered to my hotel very carefully and robustly packaged. I was very happy with the thankas I bought and very happy with the service, Definitely recommended!
Zambala is the lord of wealth and guardian of the Northern Direction. According to Hindu mythology, he is said to have performed austerities for thousand years, in regard to which Bramha gave immortality and made him the god of wealth, guardian of all the treasures of the earth which he has to distribute according to the destiny of the receivers. He is worshipped as one of the most important deities of both the Hindu and Buddhist pantheon.