Not sure if these will be of any use to anybody but I have two NC-50 units available. They are barely used (in fact, only one was ever installed). Available accessories are:

3 x Serial Modules
1 x IR emitter six pack

The above were never used.

$100 USD + shipping for everything.

I can accept Paypal or if you're local to me (Calgary, AB) then I can also accept cash or credit card (and you can avoid shipping costs).

email me at ericj at liquid-evol dot com

Thanks for looking.

Eric