Please, suggest me nylon yarn suitable for crocheting bags.

[ssaw2012]

I really like this bag and would like to have a similar one of my own. carriewolf.net/2008/07/27/new-crochet-purse-product-shots/
The yarn is nylon. I do not know which type of nylon should I be looking for and where. I guess ebay would be a good place to buy yarn. Looking forward to your suggestions.
Many thanks.

I have searched the web and there seem to be a real deficit of colour nylon threads in the UK. It looks as Hobby Craft sells nylon thread and only online but they provide no description of the material.