FBI also has the similar
Ohlins NIX 22 cartridge kit now. They're $699 including springs. No idea how the performance compares. They do mention being bolt-on, so they might be a tad easier to install too.
https://www.ohlins.com/product/nix-22/ is the product page.
And there's also the
Ricor Intiminators for <$200 to get shim-stack compression damping in an emulator-like package/install.