Browsing through my regular comic shop yesterday, I picked up a copy of Tank Girl vol. 3, the latest in a series of books that's reprinting all of the original series in chronological order. Much to my surprise, there was a story in their titled "Whatever Happened to The Smiths?" I didn't have time to read it, but it appears to be a beautifully-illustrated short story telling the "truth" about what happened after The Smiths broke up.
I wasn't able to find a scan online, but here's the review from The Independent, which briefly mentions the story about The Smiths:
"Tank Girl lives in a post-apocalyptic hell of ultraviolence, junk food and porn, but it's good to see her creators Jamie Hewlett and Alan Martin paying their respects to such key cultural figures as John Peel, Ken Hom and Buzzcocks in Tank Girl 3 (Penguin pounds 9.99). Yet again TG hits the road with her companion Booga, the mutant kangaroo. Together they blow away a convention of bounty hunters, go on a quest for "culinary enlightenment" and defenestrate Ken Dodd. Sub Girl dies a poignant death ("I'm fading fast, Tank Girl, the world's slipping away from me ... this is it, I'm actually dying") and we take in a small digression to find out "Whatever happened to the Smiths". The crazy, inventive graphics which have made TG a fashion icon are paired with the most hazy, approximate spellings and playground obscenities. Reprehensible stuff, but undeniably funny."