Just bent them by hand with a pair of piers. I made a bunch the same, so I measured and marked them with a felt marker, and made bends on the mark.
I probably have about 25 each of 1/8in ones in various sizes, and 20 1/16in ones bent in two sizes.
Thanks! Yes, the cathode is lead.
Working on my new tank now... it's about double in size.
