--- 2nd edit: back in stock
And they are gone. More parts are coming.
--- original ---
There are only a few kits left from the first batch. After the current stock is gone, there will be a couple of weeks delay in shipments. The store software is keeping count: It will show either "In stock" or "Availability: April 28th". By end of April, I should have more parts in and kits available again. In the meanwhile, you can still place an order.