Torklift has been around more than 40 years and I replaced the happijac mounts on my 94 with their frame mounted tie downs.
That may be so but the Torklift frame mounted tie down was not invented until 1990,then who knows when they were available to the public and through who.I certainly never heard of them back in the 90's yet.
Back then Verizon was not even born and the internet didn't exist in my mind(laughing)..So the bottom line was "back then" was if the local RV/hitch shop didn't have it,they did not exist,to me anyway..
The internet has changed the RV industry and availability. Tork Lift tie downs are very good and have a couple issues for some and Happi jacks are also good and have there draw backs to some especially with heavier campers.