They are pretty difficult to find. Confirm the size of the ones in your back box- I may have one I can send you if they are the same as the ones in my Too Score.

They are the same size as "Top Score"/"300". All Gottlieb games with the animation balls in the backbox used the same size. Some games had all red, and others had a mix of white and red.
Williams "Zig Zag"/"Wing Ding" used smaller balls in their backbox animation unit.

I found these two lying in the cabinet of a parts game (1962 GTB Rack A Ball). Help me get them to you and they are yours!
They measure 1 1/4" in diameter.

IMG_2262 (resized).jpg

Those will clean up with Novus. I was able to find one for a Bowling Queen that was missing the 12th ball but i have yet to make all 12. Ha. Still nice to know it's complete.

I've had several copies of "Bowling Queen". Had my first one set up and playing for a couple of years. Made 11 balls twice, but never made all 12.
I brought another one I had to Pinfest several years ago. The great Vic Camp strode up to it, and played a game. Stinker game; he got like 600 some odd points. He said "that was my warm-up game". He then restarted the machine, and proceeded to rack all 12 balls in that game! The man is a legend!

Crazy. I know about Vic Camp's collection but didn't realize his playing prowess. 8 or 9 balls on Bowling Queen is a good game for me.