My Datsun keys just went through the washing machine

In hindsight I prob should have arranged a spare ages ago

AVS system with a TX404SV5 keyless entry remote.
There is still power etc in the remote but it no longer communicates with the car.
I have contacted (emailed) AVS in Auckland and their local installer over in Nelson. I have called but it is after hours so no body is at work.
I didn't install the system so don't know the code
Any ideas? I guess rip it out and put a new one in would solve it
Still can't figure out how to put pictures up
