The Chinese company Light Lens Lab will soon release a new Cooke Speed Panchro 50mm f/2 SP2 lens for Leica M-mount - a recreation of the original Cooke Speed Panchro from the 1920s but with improved full-frame sensor coverage (originally was Super 35) and improved coatings. Price is still TBA, but it will be lower than the LLL ELCAN lens since no lead/lanthanide is needed for the production of the elements. The lens will come in several different versions:
Update: PopFlash is now the official distributor of LLL (Light Lens Lab) lenses in the US - check out the LLL lenses listed at their eBay store.
A few videos of the new lens can be found on the PhotoRumors Instagram account: