For the purposes of driving a second robot in your home lab, it does not have to be any particular D-Link or OpenMesh router - any WiFi router that you can power from on-board the robot and that can provide IP addresses for your RoboRio and your driver station laptop will work.
Keeping with the thread topic, 2706 made it a priority early on that we were going to build two copies of our robot for drive practice (and also wiring practice, fab practice, etc.). We received one complete RoboRio control set in the rookie kit last year and one of our mentors was generous enough to buy a second whole control system to donate to the team.
Our two robots were
virtually identical except one used Victor SP's and the other used Victor 888's - most sourced from vouchers and/or FIRST Choice.
Edit: here's a better photo of the
twins