Yes the Wheel Lock Set for 1/2" Wheel Bolts # RG01-150 is a fit for the 1/2 inch wheel studs of your 2013 Kodiak 161E camper as this fits the standard 1/2 inch wheel stud size of campers. view full answer...
While we may not have an exact replacement for the powered jack that was on your trailer we do have a better solution for a replacement jack. I recommend the Stromberg Carlson Electric Trailer Jack # JET-5000 as a replacement.
It has a lifting capacity of 5,000 lbs which would be more than you'd need but will ensure that the jack will operate quickly and last a long time. view full answer...
We do have an option for you, though your 2" x 4" square channel bumper does not have the strength and stability for a trailer hitch to work, which means you will need to use a frame-mounted hitch on your 2016 Dutchmen Kodiak travel trailer. For this the Adjustable Width Trailer Hitch Receiver for RVs # 13703 so long as your Kodiak has a box frame, C-channel frame, or I-beam frame that is between 22" and 72" wide. This hitch has brackets which you can either bolt or weld on, as you can... view full answer...