Replacement key with key fob

[modmonster]

So it looks as if I lost the wife's main car keys today which also had key less entry fob. We are using the spare now but I wish to get another replacement if not second spare as well. This is a 2006 3 door 1.0 litre petrol Yaris by the way.

I know Toyota can supply these but the cost in my opinion amounts to extortion. Can anyone suggest where else I can get a replacement from?