This item was originally designed for 1970s Triumph Stag(Part number 715382) but could be suitable for other applications.
Moulded rubber 1.8mm thick x 50mm high with 12.5mm hole for the gear lever.
Make your own retaining ring for the 145mm diameter x 12mm wide mounting flange.
Maximum lateral lever movement at the gaiter hole is approximately 25mm.
RUBBER GEAR GAITER #GRGTR2