Short Replacement levers come and go on Ebay. Hopefully this one will be around for a while

Try this link [[https://www.ebay.co.uk/itm/2pcs-Motorcycle-Universal-Hydraulic-Disc-Brake-Master-Cylinder-Clutch-Lever-L-R/123213595173?fits=UKM_Make%3AAprilia%7CUKM_StreetName%3AStrada%7CUKM_Model%3APegaso&epid=14020834690&hash=item1cb01a4225:g:w4cAAOSwaeRbMfyI|Ebay Link to Short Lever (May 2022)]]