No worries. A more expensive version is available at
http://www.equatorialplatforms.com/
Just search for “equatorial platforms”. They are also know as Poncet platforms.
If you want plans just add the word you your search. I found this one
https://photographingspace.com/diy-e...form-pictures/
There are many on the web.
Bintel used to sell the Johnsonian EQ platform but I think the manufacturer no longer makes them. This was maybe 10 years ago.