Welcome to iRV2.
If your RV was built by the same Vanguard company I'm thinking of , it was Canadian made they had factories in Ontario and B.C.
I believe the company was a victim of the 2008 economy disaster and they may have never had an internet presence. Appliance info should be available online those manufacturers are still around. I worked on a ton of the Class Cs and van conversions the company produced but not their 5ers.
I'll see if I can track down any info, could be the company re-surfaced under another name.
I'll re-post if I find anything.