[Richard]

I found an almost direct replacement at Tractor Supply for 230 bucks. The only difference is a rigid mount vs an isolation mount on the old motor. It bolts right up.

But, that's not the whole story. I called Grainger, but I used the 800 number listed on the site when I googled and found the branch here in Amarillo. Guy said, yep, got one in stock. Ok, so I hustle across town to pick it up. Hmmmmm, they don't have it. Counter guy explains that phone reps are instructed to tell callers they have it, even if they don't. He says he can order it. I was not happy. Perhaps I told the counter guy about my feelings about the practice. He apologized, but apologies didn't produce a motor. So I sourced it on my own, and saved about 200 bucks in the process.

Same motor is less than 200 bucks at McMaster Carr, one of the most expensive places to buy anything.