Here is another area where the RV industry lags behind others by many many years. When I purchased my used Ford F150 a few years ago, I asked for a warranty report. Had one in my hands in about 5 minutes. I think it is a relevant request, as I might think differently about buying the truck if it had an engine replacement, multiple warranty items, etc... The same goes for a RV, I would think differently about it if the report showed replacement of a whole wall, frame problems etc....
As of now any auto, marine, ATV, snowmobile, etc... dealer can run a report in about 2 minutes if they have the serial number of the product (assuming you are a dealer for the brand). I'm not sure this would be true for an RV dealer.
Now as for a customer calling the factory to get this information, that might be another story, I can see why they might be uneasy to do this.
2015 Starcraft Travel Star 299BHU Black Pearl Edition
2011 Jayco X23J (traded in)
2009 Ford F150 FX4 SuperCrew