Hi Jerry, call Thor phone support: 877-855-2867 ext #2 then #1 (last time I called) and have the last 8 digits of your VIN ready. These are pretty good people and I've found them to be really helpful.
So, I made the call and got a partial answer. The part number for the rear clearance and side marker lights, are:
Command Electronics - K-52 in red, K- 51 in amber. K-51 Amber/K-52 Red: NEW LED CLEARANCE LIGHTS ‚€” Command Electronics
Google that and find your best price.
The small ~1 inch round clearance in the fronts, I've not found .