This is the battery I bought and use and is the charger I bought and use. Both from eBay as you can see
Oh i just found, 1700mah Andida Battery for HTC Legend G6 A6363 A6388 for US$ 8.99.. it looks nice
I'd be very cautious about that, it is nearly twice the capacity which is very hard to believe given the dimensions...Li-Ion / Li-Pol technology couldn't get that far in those two years Legend is out