Thanks Butch. It turns out I was able to repair my old gear box.
I disassembled my ball lift gear box by drilling out the rivets and found the old grease had turned to glue. I cleaned it up re-greased and reassembled using small screws. I had to drill out the rivet holes a small amount to fit the screws. It is now working OK.
Knowing I could find a replacement ball lift gear box shored up my confidence to take it apart. usually all the gears fall out and it becomes a puzzle to how the gears were originally placed. This unit is on the simple side so isn't wasn't too difficult to
It is good to know there are resources for bingo machine parts. Thank you.
Now to determine why the ball lifter continues to feed all the balls.