Your search for "Monster 821" revealed the following:
CNC RACING | Rear Stand for Single-Sided Swingarm
$300.29Maximum Solidity and Stability: Made from powder-coated iron, the rear stand rests on a wide base with two wheels per...
CFD105/D12 - HYPERSTRADA LOW 821 ADJ. CARTRIDGE KIT
$649.7520mm diameter pistons. Adjustable in compression and extension. Preload of springs Nb. The kit does not include the oil.