I thought I'd remembered seeing a post on this forum about someone looking for updated contact info for Mr. Sterba; can't find that thread now. Just saw this on Homebuiltairplanes:
https://www.homebuiltairplanes.com/forums/threads/ed-sterba-propellers.36670/
Today at 12:30 PM
Anyone interested in contacting Ed Sterba please use his new email address of: [email protected]. His phone number is 941-778-3103