The next two TTartisans rangefinder coupled lenses for Leica M-mount are rumored to be 21mm f/1.5 and 35mm f/1.4.
7artisans already has 4 lenses for Leica M-mount (see pricing and availability at Adorama and B&H):
Update: TTartisan lenses are available for sale at the PhotoRumors Online Store with free international shipping.