Snap nocks by Marco
Superglue like Gorilla glue is all I use on nocks and feathers. It's compatible with most finishes, great with polyurethane.
Daniel, I have a bunch of 5/16 wood shafts, and I'll be glad to donate some to the cause if it will help. They're hardwood, and much tougher than POCedar. These are not spine and weight matched, but I do have 5/16 that are matched, in the 30-35-40# range.