i got the timing belt work done in november 2018. I was also under the stress of finding the genuine stuff and had decided to go for aftermarkets. But luckily, honda 1s in khi was offering genuine parts so i opted for them and found a massive difference in the build quality of aftermarkets and genuine. its not only about the money and honda stamp, its more about the longitivity, durability and peace of mind. I was offered an aftermarket timing belt from honda spare parts dealers for rs. 700 with an expected life of 15000 - 20000 kms. However the difference in price of genuine timing bearing and after market timing bearing was negligible. Both were around rs. 7500.
would agree on GMB. They make good water pumps.