Wonder what happened to our bikes?

I'm sure everyone has thought about what has happened to the bikes they owned in the past...
I was just looking at some photos and thought I'd check on the DVLA-Website to see if they're still in the country and taxed and it looks like my orange Firestorm and Hilary's Thundercat are both untaxed but still in the country and her GPZ appears to have been exported in 2007.

Just out of curiosity has anyone here bought the Thundercat by any chance? Here a photo with the Reg-number:
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And here's one of the Firestorm and the GPZ... maybe someone's seen them around?
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Guess it's one of those "Whatever happened to..." moments