BYG2084 Bracket, Hinge, Windscreen & snorkel, RFSV is still currently available, and is not $800 +++ dollars.
Yes it is expensive, but it is a low volume cast piece that is then macined, so I can see why they are reasonably costly.
If you grab any part number from the RPS docs dealers should be able to source them. Most dealers just aren't familiar with the military side of the business.