Here is the list you need to get on the RHR network from Elecraft.
PLEASE NOTE: If you are planning on using a K3/0-Mini then simply watch this video:
List for K3/10/100 ( A K3 with a RF Deck):
1 x RRIGCON RemoteRig 1258MKII Control Unit Only*
RRIGCON is provided without a power supply by the manufacturer.
If an external power supply is required, please add PWR12V1A-US (External Power Supply) to your order. $289.95
And the cable kit to go between the K3 and the RemoteRig.
1 x RRK3CBL Cable set for Control K3 to Control RemoteRig 1258MKII. 49.95
Mention RemoteHamRadio when you do the order.