Does anyone have a panel fix for this airplane that includes a standby attitude indicator? It's suppose to be a commuter aircraft, and at least in my country, the airplane cannot he flown with more than 9 seats without it. I know this is flight Sim, but it is grinding a bit on my OCD problem :/

Is the co-pilot's attitude indicator not enough backup?

It is not enough in at least several countries including the US, Canada, Australia, and probably many others.  As part of the acceptance check by a line pilot for this particular aircraft, without a third independently driven attitude indicator, this aircraft is not airworthy.  Here in my country, anything with 10 or more seats operating in commercial air services require a standby indicator. 

 

On top of this, it is a dual EFIS setup.  I am not aware of any 1900D without the third attitude indicator. 

It is not enough in at least several countries including the US, Canada, Australia, and probably many others.  As part of the acceptance check by a line pilot for this particular aircraft, without a third independently driven attitude indicator, this aircraft is not airworthy.  Here in my country, anything with 10 or more seats operating in commercial air services require a standby indicator. 

 

On top of this, it is a dual EFIS setup.  I am not aware of any 1900D without the third attitude indicator. 

I understand exactly what you mean, this B1900D is set up with what you might expect in an executive version of the 1900, not one sold to a commercial operator.  Modifying a virtual cockpit with 3D parts requires changing the 3D model.  That is something that only Carenado can do.  Do not expect them to do anything further with this model as it is not in their business practices to upgrade, update, or patch their releases after any initial patches.