There is a series of books called the "Firefly Companion" I believe the first one has some info. Not sure if the rPF search function works but you can always search the RPF via google. Lots of info here. As far as denect to accurate metal replicas, the Moel 47 and Model 47a are about as close as you will come in metal and were offered in very limited numbers. The Sidkit is more affordable but made of pot metal.