Seriously, there are exactly two cases in which this is actually useful (though it is, regardless, neat):
1) You bought a 360 specifically to run Linux or otherwise mess around with homebrew stuff and will never ever use Live, and you already bought an Infectus and dumped your NAND and CPU key for this purpose. In which case, you might well be able to sell someone a copy of your keyvault. But.. given the current state of homebrew there are very few people doing this.
2) You bought an Infectus and dumped your NAND and CPU key to try out homebrew stuff, but now it's died and you can't get it fixed. In which case, you might well be able to sell the keyvault, or keep it for in case your replacement box gets banned. Most people messing around with 360s like this will probably keep it

So, quit asking for people to help you get unbanned. Nobody is going to fit an Infectus (16 wires!) just to dump their keyvault and give it to you (especially since if it's an up to date box you also need the timing attack board, which you may have to make yourself, and needs even more wires). It's a huge amount of effort and the only way it'll be worthwhile is if they happen to have dumped everything in the process of messing with Linux and stuff.