There is always this, its only an alternative.
At 14 dollars, its not a terrible buy from evike, minus the fact that I hate evike and they will probly try and rape you on shipping. As with airsoft guns, be wary with silencers. Silencers are illegal to import, but this isnt a silencer its just something that looks like one and is not designed to muffle sound. However that doesnt mean the CBSA will not take it anyways.