6 sided bark log block?

Yes.

It pretty much requires some sort of worldedit or item command, and you use:

//set ID or whatever /give ID command syntax you use.

I have found that //set works the best, as giving the item is a bit glitchy since it isn't an actual block. Keep in mind this requires a rank if you plan to use this on the creative server. If you don't want to get a rank, you can also try out MinecraftBuild for using the required command.

Here's an ID list that you would use for the command (I came up with from memory, correct me if something ends up not working):

Oak: 17:12 or log:12
Spruce: 17:13 or log:13
Birch: 17:14 or log:14
Jungle: 17:15 or log:15
Acacia: 162:12 (not sure about block name)
Dark Oak: 162:13 (not sure about block name)

Thread locked since OP's question has been answered.