PinkyParadise is one of the best places to look for a large selection of contacts along with many colours to choose from!
Here is a link to the store:
The only thing to be wary of is how light/dark the colours you may choose to buy are because naturally dark eyes clash with light-coloured contacts...but I am sure that you know that already. c:
Regardless, I recommend that you take a look at their site, they're very reliable!