You're right, not much to go on.........
I don't buy any of that for a second Jeff. Yes, it IS rather strange that they just sort of "magically" appeared out of nowhere into the hobby though. But that is still not to say that there are not, or cannot be genuine Campbelli hypos out there, because there could very well be. Some yes, certainly not all of these are the real deal.
Now the length you refer to could easily fall into the "slot" size of a Campbelli x Hondo cross. How many 7 foot Hondos does anyone have?, or do you know of.....not many, I can safely tell you that much. However, there are literally countless hundreds of thousands of Hondos in the 4 to 5 foot range out there, that is exactly the size I would expect a Campbelli x Hondo cross to basically be anyway. Another thing is that "hondurensis" didn't even start out being intentionally crossed with anything, the people from the very origin of import couldn't tell you an abnorma from a freakin hondurensis if you paid them, so they were grossly misidentified from the very beginning. The import politics were just like anything else. They say they are from here, when in fact they came from many places in Latin America, and were sold OUT OF location "x" for import simplicity, just like many other things in this world are..LOL!. Diamonds are like that too, if you don't "know" their origin, you sure as hell cannot tell where they came from once they leave the point of origin.
Your statement about the Hondo breeders bringing this up as a "smoke screen" doesn't hold any water either. Only very uninformed folks could possibly think for one second that ALL milks from Latin America could ever be "pure" anything!....much less just hondurensis. Latin America is a very big place, and for anyone to think that all milks with triad rings and a snout band can only be hondurensis is living in a dream world.
Fact is, people cross all sorts of crap, and I know there HAS to have been many people that also got the bright idea to cross hypo Hondos into campbelli as well a long time ago. Surely you do not think they are all the "real deal" out ther, I don't see how that would be even remotely possible now. Jeff, certainly you know that there are hodge-podges of just about everything imaginable out there, and to say there cannot be any of these hypo Hondo x campbelli crosses out there is just not realistic at all to me. All I know is that I was never one of these people!, because if people didn't DO IT IN THE FIRST PLACE, it would never have to be an issue to begin with, but they DO, so it IS! 
Now I am thinking that there could be some genuine lines of these hypo campbelli out there, and I am also quite certain that there has to be plenty of "counterfeit" crosses as well. Given breeder's "track records" around the country with all the crosses that they do, this only seems 100% logical to me. I have been around enough decades to know this is the way it is done....simple as that really.....sad , but true as all hell! 
Don't see how it can be argued when I see people posting unknown crosses and advertising them ALL THE TIME on a daily basis..LMAO!!
~Doug
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"a snake in the grass is a GOOD thing" 
my website -serpentinespecialties.webs.com