Thought I would share my cable that I built to replace the cheap one provided with my JVT 89 Guitar.
I got the Neutrik connectors from Parts Express www.parts-express.com part # 092-181. The cool thing about these connectors is that they can be installed on existing RJ-45 cables. The actual cable came from Amazon.com listed under "Aurum Cables - Cat5e Network Ethernet Cable (75 Feet - Red Braided)". I shortened it to 25 ft by cutting it and adding an RJ-45 connector. Total cost was about $30.00. It is much better than the supplied cable and works great.