Well, I'll be a monkey's aunt! I found what I've been looking for right here:
https://986forum.com/forums/boxster-general-discussions/58273-engine-lift-hook.html
[Note to self: Search 986forum
first.]
I plan use the described lift hook point in conjunction with another attachment point, one of the motor mount's bolt holes at the front of the engine, the same way the eBay engine was suspended. The lift hook attachment point alone is not intended to support the entire 570 lbs.