Rob
What are you looking for exactly? The Alpenlite manual for the rig? The manual(s) for the appliances and sub-components? Both?
You do know the "owners manual" for most rigs is fairly skimpy on real useful info, and does NOT include the manual for the oven, the A/C, the furnace, the water-heater, the axles, the.....
For those, you can get PDFs from most of the manufacturers web-sites.
However if you are looking for a good "how things work and how to fix them", get Bob Livingston's book "RV Repair and Maintenance Manual" (sold at Campingworld and some books-stores)
2008 F350SD V10 with an 2012 Arctic Fox 29-5E
When someone tells you to buy the same rig they own, listen, they might be right. When they tell you to buy a different rig then they own, really pay attention, they probably know something you don't.