After a long long survey at around 7 / 8 tyre shops, i phoned my mechanic, finally installed 'General Tyres' as this was the only brand in which 155/80/R13 were available. 2nd option was yokohama, but all was old stock of 2009/2010. My mechanic said, these yokohama has completed more than half of their life in shelve, so go for General.
Car has become smooth and steady, humming sound gone.
Rs.14K paid for new tyres. Old tyres adjusted in 4.5K and net paid Rs.10K including alignment charges.