Does it have to be original correct or are you open to updates? Borgeson has a complete kit listed albeit out of stock. Bergman sells the same box at a better price but you'd have to source your brackets from Bouchillion and a pump from NAPA.

https://www.borgeson.com/xcart/home.php?cat=143&sort=orderby&sort_direction=0&page=1

https://bergmanautocraft.com/

https://www.bouchillonperformance.com/products-steering-brackets

Kevin