Got mine at Wal-Mart, the $59 one that rotates up and down and has a swivel arm. Do not install with the screws they send...I bought 2 one inch lag bolts of the same thickness as the one's they have in the package and drilled a small lead hole...it worked out very well. Good luck.
Jim & Linda Tator
2013 Crusier CF34SS Ford F250 PSD 7.3L
Ride-Rite Airbags Bully Dog
154 nights in 2013 - 4,370 miles
99 nights in 2014 - 4,621 miles