I'm going to guess it's a Ramco. Even though Monaco used both Velvac and Ramco during the mid-2000s, by looking at photos of a 2006 Monaco Monarch, it appears yours may be a Ramco.
As has been discussed previously, the way you can supposedly tell easily if a mirror is Ramco or Velvac is the head mounting position.
A modern Velvac mirror will have its head offset slightly from the middle of the mirror. A Ramco mount will be centered on the mirror head.
I'd at least call Ramco tomorrow and ask them for their assistance if you can't find any markings on the mirror arm or head.
Ramco has very good customer assistance.
Ramco website with mirror head images and model numbers ...also will have contact information --
go HERE