Gary,
You might be able to solder it back together.
I had the same problem on my Cantenna. One band broke on the bottom of the resistor. I removed the resistor and used steel wool on the bottom and top of the resistor where the band goes around. I re-assembled with a band on the top of the resistor near the SO-239. On the bottom I tightened the 4 screws directly to the resistor, with no band, and my Cantenna has been working great.
After the fact I experimented and re-soldered the broken band together. It seems very solid and I think it would work.
I can't seem to figure out how to insert an image to show you a picture of the band I soldered back together. I seem to recall I had to do more disassembly to re-assemble the resistor.
Good Luck,
Ed