If you want to give me a half tone screen for the cost of postage to OZ I will pleased to help you in your dilemma - However, I can't read the labels on your boxes from your digisnaps, but one of the boxes labeled "Kodak Gray contact screen (negative) 133 Line" might be right, I will go into the darkroom and see how my dirty one is labeled - Hang on, I will be back very soon
I am back, yes, that might work, the one I used for making silk screen negs was a negative elliptical, but the one you have might work - I gave up printmaking years ago, but Rae is interested as a way of making very short run posters that feel "real" rather than digi-ink-squirt posters - In this too I will probably end up being her darkroom boy while she cooks - Which is fair enough
John