Yeah!! I'm glad to hear you got it apart and reassembled.
If you ever do lose the screw, any shop should be able to order it. I don't know if Jenny does special orders or not, but she might be able to as well.
The part # is 200614. I've had to hunt for them too, so I looked it up to know if all was lost if I didn't find it.
Shouldn't be more than a couple $ if needed.
I turn the machine on end (resting on its handwheel on a towel) and use a magnetic screwdriver. It means I only drop it 5 times instead of the surely 20 times the first time when I didn't stand the machine up and use the magnetic screwdriver.