Hey, it's not really hi-res, but I rebuilt it for our shrine to alt-coins (public keys only):

http://i.imgur.com/i1nhi9E.jpg

Here is the Mazacoin template I threw together:

http://i.imgur.com/htSySNB.jpg

And a link to and album of all the other ones:

http://imgur.com/a/667ql

Next time I fire up photoshop I'll put together a higher res logo.