lol, I just searched for threads with my name and came across this old post I missed.
Anyway, the answer is that yes, I made the chainmail. It's all aluminum electric-fence wire that came on 1/4 mile spools. What you see pictured there is about 1/2 mile of wire (2 spools). I just recently started into a third spool to extend the length of it to make it hang to knee-length. It's not meant for the prop, it's for me actually. But Herb can wear it from time to time for this sort of thing.
Thanks, I'm glad you liked it! Sorry for responding nearly 2 years late!
Basically, I coil the wire onto an aluminum rod that's stuck into a power-drill. Some people build rigs that hold the rod and drill in place and guide the wire in. I'm not so sophisticated. I just use a leather glove and guide the wire onto the rod by hand with one hand while the other operates the drill. Once the coils are made, I use 8" bolt-cutters to clip it into rings, which are then painstakingly linked one by one. The hauberk and coif together have about 1/2 mile of wire, which works out to about 25,000 links. It takes me 20-25 minutes to add a row to the hauberk (about 122 links) if they're already separated out and opened far enough that I can just quickly link them together. Bent-needle-nose pliers are your best friend for this part.
These pics above are from when I used to use an 18" rod. I do 3' at a time now.