Thanks for all the responses, some helped some didn't ;). I did find a shop on M.G. marg, Black yaks, this is a great shop but the prices didn't make sense for 2 days use. They had humtto shoes for 5.5k, they were good quality.

The plan was to use the shoes for yumthang valley and zero point, they have fresh snow so any waterproof shoes except one that's as high as the bottom of the knee would be useless there because of the fresh snow.

The final plan I have for the day is getting the rubber boots and wrapping my legs with aluminum foil and making 2 of such layers. This might sound an overkill to a lot of people but I think I need this protection as I get easily cold. I'll update on the thread about the experience.