We apologize for the delay --
We have not received a new solid estimate from GMK as things have gotten delayed further since the last update. Novelkeys and I estimate that we will receive the kits in August. Extras will be available after the GB ships out, and will be announced through the Novelkeys newsletter. For other vendors, please consult with their newsletter.
edit 8/1/2020: requested a new update. Hoping to hear back soon.