Cosplay Station (dot) ca will make them on commission, but they are very expensive, mortal kombat halloween costume around $225.000. But there is usually no set time for when cosplays are purchasable because they are usually fan-made. Choose your character: Take time to study the character you want to portray. Try checking a cosplay site such as Cosplay Magic or Cosplay House. You can find a few cosplay costumes at various locations in London, but the best and largest inventory is simply found online.