Buyable spawners plugin?

Hey, i know of a few servers (gontroller) where they have an essentials shop sign of a creeper spawner (52:50), but when I make an essentials shop, it gives a 52:50, but is still shown as a pig spawner, and doesnt spawn creepers. Are there any plugins, or can someone help with a fix to this? I am not looking for bbyspawner, or monsterbox. Thanks in advance!

 

I've seen servers like SavageRealms with buyable spawners, as well. I want to know where they got it or how they did it :[

 

Its just plain minecraft item 52 is the spawner and then 52:50 is creeper and if you keep changing it it changes the mob type. Just put that on a shop sign it works perfectly.

 

I know how to do it, first you need to get the plugin "silk spawners" at http://dev.bukkit.org/server-mods/silkspawners/ This plugin makes it so when you mine a spawner you get the spawner. After you have it installed it will add the item ids for each spawner like 52:50 etc. so all you need to do to sell them at your shop is (assuming your'e using essentials) type [buy] 1 52:50 (price) into a sign. Now if you don't want players to be able to mine spawners with silk touch you can just set it to need permissions in the config and you will still be able to sell them. Hope this helped -CraZ