Hey Brett - good idea!
I just googled "Eureka Prince" and you are correct...there was one! If you look at the link below, you will see the famous ad for the first tapered Princess with the handle on top. But the last line of the ad says: "And be sure to see the new Eureka Prince (it's the Princess PLUS!)
So now we know that this model name did indeed exist! Now I would love to see what it looked like....
Eurekaprince
[URL unfurl="true"]http://www.vintageadsandstuff.com/viewhouseholdvacuum7.jpeg[/URL]
