Laowa is teasing a new lens to be announced on Sept 6th, but the associated text claims the lens will be announced during a live stream on Sept 5th at 20:00. No additional details are available at this time.
On September 6, another new product is coming!
At 20:00 on the evening of September 5th, the video number [Laowa Lens] will live broadcast to deliver new lenses
You can buy Laowa lenses and accessories directly from Venus Optics, or Amazon / B&H Photo.