Sage 50 2019 SDK Release Date

Hey there.

We recently updated our Sage 50 Accounting software from 2018 to 2019. Naturally, the software we use that integrates with Sage is now unable to connect and sync data. 

Is there a current release date for the Sage 2019 SDK or is there a link to the download? We rely on our third-party software to sync with Sage to update inventory counts for our production builds and currently we're having to do this by hand for 1,400+ items & assemblies.

In the meantime, is there any way to create a hotfix to allow our 2018 SDK applications to connect to Sage 50 2019?

Any help would be greatly appreciated.