Um, what? Why do you need a new wiring diagram to replace them? Why not just get another cluster if yours is ****ed up? Their cheap as hell at the local scrap yard much cheaper than those gauges probably.
I can e-mail you the FSM wiring diagram for the cluster just PM me. But it's not going to help you at all. The factory cluster works hand and hand with the Body Control Computer and PCM on the car. So a aftermarket cluster will not work. You can add a few like oil pressure and voltage if you want, but those lead wires go direct to the engine compartment. And will not work with the connector that the factory board snaps into.
If you want a diffrent look to your cluster, you can always get a cluster out of a Trep, or Vision, they are plug and play and they both have a different look.