Hi mate,
First off, i'd like to point out that page doesn't exist. I can't access it.
After 1 round of google, i found that this mac pro actually doesn't support monterey. Soooooooooo, i suppose that ain't gonna work. The reason it probably can't find drivers is because you are using an unsupported mac, which inevitably means unsupported hardware. If you are hackintoshing this then you probably won't be able to find any drivers as i had not heard of this apple raid card up until this point.
Hope this helps :)