I stand corrected. The 216 series is 250VAC. I thought I read otherwise, but you are correct that it is in fact a viable part. I'm going to get several so I don't have to worry about the other ones I have (in case they were also abused and pop at some point). Any of these is pretty reasonable price-wise compared to buying a new filter from Smarthome, so I'm not too worried about it.
FWIW, I tried to remove the cap from the fuse I had desoldered to see if I could just slip it over a new clip in fuse...that didn't work. The ceramic shattered and revealed the wire inside. Upon examination, the fuse was definitely burnt. I also thought I might be able to replace the axial lead fuse with a fuse holder and cartridge fuse. That would work if there were more space. As it is, the holder contacts one of the coils so I'm not going that way!