Problem on finding correct package after migrating to Unified API

Hi, I just migrated to Unified API, I'm re-adding all the packages, Xamarin Forms 1.3 added successfully, now I'm trying to add Xamarin Labs but I'm not able to find version 1.2 from nuget, only 1.0.1 is displayed. Why this? I need to add Xamarin Forms Labs iOS for CustomRenderer.
Thank you for your helps.