The feed store sell stand-alone electric coil burners and they're not expensive, I think they're only $15. I have a friend who cans on her glass top, even with her pressure canner. It makes me nervous, though. We do NOT have the funds to replace this cooktop, even though I'd be thrilled to replace it.
It is even more annoying because it is a super expensive Electrolux Icon. It is the worst thing I have ever cooked on, it burns things so easily. I've cooked on cheap apartment stoves, gas stoves, over a campfire . . . this thing is the worst.