Reese and DrawTite stopped using the flat spring & pin retained style round bars a few years ago, retention is completely different. So you probably won't find new bars from them any longer, used occasionally show up on craigslist. Curt and other basic hitch makers should be the same.
'16 Outdoors Timber Ridge 280RKS
Reese 1700# Trunnion w/ DualCam HP
'03 EXCURSION XLT V10 4.30 Axles