There are no accessory trailer tow mirrors available yet for a 2013 to add on.
Now as for getting them off of a production truck and retrofitting them we have not determined if they will be a plug and play install and cannot guarantee fitment but I will provide as much information as I can.
The following truck http://cgi.ebay.com/ebaymotors/Ram-2...ht_3652wt_1079
Has these options:
-Power Black trailer tow mirrors
-Exterior mirrors courtesy lamps
-Exterior mirrors with heating element
-Exterior mirrors with supplement signals
With that being said I believe these are what you are looking for, Pricing is as follows:
Make: Dodge | Part#: 68142668AD
List Price: $474.00
Your Price: $326.60
Make: Dodge | Part#: 68142669AD
List Price: $505.00
Your Price: $348.45
Please let me know if you have any other questions