It's very confusing the way Fred uses one term to refer to two things.
If they are going to continue writing about cars they really need to clear up the difference between left/right hand drive and driving on the left/right of the road.
"Several years ago, I thought that the writings and arguments of such people as Dawkins and Aczel, attempting to disprove or prove the existence of God, were a terrible waste of calories. "
So what changed Lightman's mind? Substitute 'tooth fairies', 'Santa Claus', 'Lucy van Pelt', ... for 'God' in that list. We can't prove or disprove any of those and it makes no difference to the progress of science.
Chemistry lab at Newcastle University had a freezer full that they were happy to share from.
Theatrical suppliers may help too.