Most government tenders for a contract are available online, I'm from Australia so not entirely sure what I'm looking at but this[1] appears to be some sort of reference to the tender, although there is limited information provided.

[1] https://beta.sam.gov/opp/588f5ed4becd4fc4abf6df8e7a918184/vi...

Edit: This[2] seems to be a notice of the contract being awarded to Oshkosh for exactly $481,877,752.00 USD.

[2] https://beta.sam.gov/opp/1e56c386808444d886124fc1927f4eb0/vi...