The powdered lead seems like something you need to be careful with tho. Quite toxic.

No more or less toxic than the powders used to hand mix oil paints. Just buy a fume hood off ebay.

P powders are tightly regulated in the States, but alas,that's where I live. How many matchbooks does one need to purchase to replicate this study?

kiln materials are listed, too

not that i think it matters that much. the paper doesn’t indicate that synthesis is a particularly sensitive step.