Ex Nba Player Sebastian Telfair Arrested Small Arsenal - Grandimage News
An ex-ambassador is not ambassador anybody. However, these days, no one pays attention to such niceties, which means that everybody pretty much gets called whatever. Just ask them.
In writing, though, the use of former doesn't seem so rare. Here's an interesting ngram. Given the huge difference between how likely people are to capitalise the second component in ex-wife compared to co-founder, i think choose a rule and be consistent with it is terrible.
