Most grease/lube companies with a website have a primer on types. Research should find something similar to what VPI uses.
The bearing only needs a minute dab every other year or so.I still use the tiny supplied tube on my 14 year old Classic.
The VPI grease doesn’t appear to be unique, just need something with similar work/load conditions-low rpm/weight bearing?
Edit
I forgot to mention there are a few threads on the subject. What to/not to use.

