Hi @Sandipsv
Since the Surge was retired and it was an all in one device, getting a new band will mean going to a third party seller. If you check on Amazon, you'll find some bands As for the process of replacing the band, you might need to do a search and see how it's done.
Let us know how things go for you.
My brother did the Amazon replacement. There was no instructions on what type of glue to use. He also discovered if the one side, not sure which side, is put on the wrong end it is a big Hassel to remove it.
He is happy and it looks very nice.