You should search for it yourself only,as local dealers offer components at much lower price then people who sell online.
btw,I know few websites who sell stuff like this online,but haven't checked on it yet whether your product is available there : element14,explorelabs,thinnkware,vegarobo
But,instead of buying it online,I highly suggest you to buy it from a local shop,in case if it is not available there,then buy it online.