Seems like Visual Studio 2017 is no longer available on Microsoft's website.
Radaee's Xamarin version works good with Visual Studio 2019, i suggest you to install the last version, you can find it here:
It's not possibile porting in Xamarin.iOS right now.
We're considering the possibility of including methods and proprieties also in these classes but we don't have a roadmap yet.
If you urgently need this feature you could ask about a custom development. You could send a ticket addressed to "sales" section.