No blocking wires anywhere to be had for love or money (or, Amazon has someone who would sell them to me, but they come with their own sandpaper because you have to smooth the ends off yourself and they still cost $24 and I'd have to wait for days for them to come), so luckily the Internet can supply DIY guides for almost anything, right? I found this one at Another Long Yarn, but no welding supplier with stainless rods seems to be around me, either. Desperately trolling the aisles of Lowe's, I did find galvanized wire that seemed about the right weight, and the Internet tells me galvanized means no rust, so I'm trying it. Cordless drill battery currently charging, for the rounding off the ends bit. I'll let you know how it goes. It's not really possible to get the wires perfectly straight, but I think that's ok. Fingers crossed!