I literally just bought one on Amazon.
https://www.amazon.com/gp/product/B08SMFCLN7/ An American company, but the product seems to be a Chinese copy of the Wheeler. I have not had a chance to try it yet.
The Wheeler:
https://www.amazon.com/Wheeler-Engineering-Construction-Gunsmithing-Maintenance/dp/B01B3NU0U2/
This one also got good reviews:
https://www.amazon.com/dp/B08BB6W9ZZ/
And here's a very low priced sight pusher.
https://www.amazon.com/WIREGEAR-Heavy-Duty-Construction-Universal-Semi-Auto/dp/B09FLGFD35/