How can I find .rpk files in ArcGIS Online?

[Jim_Riedmann]

I'm rendering some buildings as multipatches in ArcScene.  I don't have CityEngine but I'd like to make them look realistic.  Some online documentation from ESRI says, "You can find and download additional rule packages in ArcGIS Online."  Well, I can't find them anywhere.  Where are they?  How does one locate and download .rpk files in ArcGIS Online?

[RussRoberts · Accepted solution]

Here is how you could search for them in Online

https://www.arcgis.com/home/search.html?q=type%3A+rule+package

[Jim_Riedmann]

Thanks, that's very helpful.  It offers a great deal to work with.