The closet thing I found for this way cool raft, is an add coupon dated 1969 to send away for an Armour Raft not this particular one. The person was selling the add and asking 24$, that's just crazy. I have spent time these last two days in between my listing, to try and find this raft and have had no luck. I am fairly good at finding things but I think I am going to throw the towel in on this one.
I found a pull behind a motor boat three and four- seater type tubular raft selling for around 275$, and it was from Armour. So, that's where we stand, my guess, promotional Item send in X amount of dollars and get this raft. The back of raft was I thought nothing special until I realized it was the color of a hot dog and looked like hot dogs lying side to side kinda. (slang)
As you can probably see from pictures the raft front reads "Armour all meat HOT DOGS The Dogs Kids Love To Bite!"