Now that 17 Republicans are running for President...?

...When will rank-and-file Republicans start demanding to see their long-form birth certificates?

I understood from the 2008 election that it was important for EVERY Presidential candidate, regardless of race, to provide to the public a copy of a birth certificate establishing eligibility to serve as President.

The current leader among the 17 candidates, Donald Trump, even sent some of his people to Kenya to show that Obama was unfit for office because he believed Obama might not have a valid birth certificate.

So unless the GOP was lying about birth certificates in 2008, I have to assume all of them have proffered birth certificates anyone can see.

Where can I find them ? If none have been provided yet, why haven't they? Or specifically what plans for providing them have been made?

And if showing a birth certificate was so important in 2008, shouldn't Republicans have the same fervor about it now?