Murmur is pretty ugly when it comes to querying, since a query response system isn't built in. Scripts that pull out the data and expose it via JSON are one of the hacks to try to compensate for this. We don't currently have a tool in place that does this.
We do have our own skinnable querying script that you can use: viewtopic.php?f=19&t=3733
. It's pretty easy to make it look like what you want by tweaking the css.