Just got these beauties in from Alpha Racing. K67 (2019+) folding clutch levers. Available in Long (190mm) and Short (170mm).
Personal preference but I prefer longer levers for race starts.
These levers are foldable just in case you run out of talent, adjustable by turning the indexed knob and compatible with the OEM microswitches as they have machined posts installed in order to activate them. As is with all of Alpha's products, beautifully made. $94.99 for either Long or Short. Clicking any of the images below will bring you to their page.