We ended up taking the Articulating running boards off to clean the corrosion off of the SS pivots and brass bushings. We broke some of the collar that hold the seal on one of the arms trying to get it off ....had to beat the arm and pry it off of the arms on the running board....
In doing so, we found the seals at McMaster Carr so we replaced the seals & reassembled the pivots on the running boards..
Also we cleaned up the pivots with 320 Emory cloth and polished the studs while adding Zerk fittings to add grease for better lubrication in the future.
The McMaster part number is 5154T71 which is 40mm OD....30mm ID.... for a rotary shaft.
Hope this helps others