$800???
The PRW are about $425 from several sources. I actually got mine off amazon for $220 on a sale/markdown. There are deals if you look and sales at the holidays.
I
You can find 273 arms and shafts in many places for less than $200. I'm sure you could post a want add on FABO.
FACTORY MOPAR SMALL BLOCK ADJUSTABLE ROCKER ARMS 273 318 340 360 | eBay