That's twice the price of the Dayton I use.
CAT had a suitable replacement for under 1K and their support was outstanding. Still waiting to hear on the warranty claim.
Could you tell us more about the Cat replacement- price, availability, etc?
Purchased through KR, though not displayed in their catalog:
It's used on our low pressure pre-soak. Not a multi-stage booster.
I use the Dayton 1K081, it's only 3/4 HP but it'll work as long as you aren't running over 250 PSI. I get them from Zoro whenever I have a 20% discount code for an order, part # G0338274.