Your search for "monster 1200 821" revealed the following:
CNC RACING | Water expansion tank cap Ducati
$44.71Water reservoir tank cap made in light alloy,machined from solid and then anodizedIt replaces the plastic cap without any modification and reusing...
CNC RACING | Fuel tank cap - Fast Key plug
$92.09Quick release cap with key for CNC Racing fuel tank flangesDesigned for those who seek maximum practicality without compromising on...
DUCABIKE PANIGALE V4 DPF01 - FRONT BRAKE CALIPER SPACERS
$26.66In light alloy machined from solid, colored surface anodizing. Product Description Ready for assembly, they replace the stock oneskit of...